{"id":77782,"date":"2024-08-31T22:07:20","date_gmt":"2024-08-31T15:07:20","guid":{"rendered":"https:\/\/itviec.com\/blog\/?p=77782"},"modified":"2024-08-31T22:07:20","modified_gmt":"2024-08-31T15:07:20","slug":"vong-lap-trong-javascript","status":"publish","type":"post","link":"https:\/\/itviec.com\/blog\/vong-lap-trong-javascript\/","title":{"rendered":"V\u00f2ng l\u1eb7p trong JavaScript: Chi ti\u1ebft 8 ph\u01b0\u01a1ng th\u1ee9c l\u1eb7p k\u00e8m v\u00ed d\u1ee5"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_84 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">N\u1ed9i dung b\u00e0i vi\u1ebft<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/itviec.com\/blog\/vong-lap-trong-javascript\/#Vong_lap_trong_JavaScript_la_gi\" >V\u00f2ng l\u1eb7p trong JavaScript l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/itviec.com\/blog\/vong-lap-trong-javascript\/#Cac_phuong_thuc_co_ban_cua_vong_lap_trong_javascript\" >C\u00e1c ph\u01b0\u01a1ng th\u1ee9c c\u01a1 b\u1ea3n c\u1ee7a v\u00f2ng l\u1eb7p trong javascript<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/itviec.com\/blog\/vong-lap-trong-javascript\/#Cau_hoi_thuong_gap_ve_vong_lap_trong_JavaScript\" >C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 v\u00f2ng l\u1eb7p trong JavaScript<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/itviec.com\/blog\/vong-lap-trong-javascript\/#Tong_ket\" >T\u1ed5ng k\u1ebft<\/a><\/li><\/ul><\/nav><\/div>\n<p><em><strong>V\u00f2ng l\u1eb7p l\u00e0 m\u1ed9t trong nh\u1eefng ph\u01b0\u01a1ng th\u1ee9c c\u01a1 b\u1ea3n trong l\u1eadp tr\u00ecnh JavaScript, gi\u00fap t\u1ef1 \u0111\u1ed9ng h\u00f3a c\u00e1c t\u00e1c v\u1ee5 l\u1eb7p \u0111i l\u1eb7p l\u1ea1i. Hi\u1ec3u r\u00f5 v\u1ec1 ph\u01b0\u01a1ng th\u1ee9c v\u00f2ng l\u1eb7p trong JavaScript s\u1ebd gi\u00fap b\u1ea1n d\u1ec5 d\u00e0ng th\u1ef1c hi\u1ec7n \u0111o\u1ea1n m\u00e3 v\u00e0 th\u1ef1c thi ch\u00fang.<\/strong><\/em><\/p>\n<p><span style=\"font-weight: 400;\">\u0110\u1ecdc b\u00e0i vi\u1ebft sau \u0111\u00e2y \u0111\u1ec3 \u0111\u01b0\u1ee3c gi\u1ea3i \u0111\u00e1p chi ti\u1ebft v\u1ec1:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">T\u1ea5t t\u1ea7n t\u1eadt \u0111\u1ecbnh ngh\u0129a c\u1ee7a v\u00f2ng l\u1eb7p trong JavaScript<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">C\u00e1c ph\u01b0\u01a1ng th\u1ee9c c\u01a1 b\u1ea3n v\u00e0 c\u00e1ch s\u1eed d\u1ee5ng c\u1ee7a v\u00f2ng l\u1eb7p JavaScript<\/span><\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Vong_lap_trong_JavaScript_la_gi\"><\/span><b> V\u00f2ng l\u1eb7p trong JavaScript l\u00e0 g\u00ec?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">V\u00f2ng l\u1eb7p trong JavaScript cho ph\u00e9p b\u1ea1n th\u1ef1c hi\u1ec7n c\u00e2u l\u1ec7nh nhi\u1ec1u l\u1ea7n cho \u0111\u1ebfn khi m\u1ed9t \u0111i\u1ec1u ki\u1ec7n \u0111\u01b0\u1ee3c \u0111\u00e1p \u1ee9ng. V\u00f2ng l\u1eb7p (Loop) gi\u00fap b\u1ea1n t\u1ef1 \u0111\u1ed9ng h\u00f3a c\u00e1c t\u00e1c v\u1ee5 mang t\u00ednh l\u1eb7p \u0111i l\u1eb7p l\u1ea1i, ti\u1ebft ki\u1ec7m th\u1eddi gian hi\u1ec7u qu\u1ea3.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">V\u00ed d\u1ee5, b\u1ea1n th\u1ef1c hi\u1ec7n hi\u1ec3n th\u1ecb d\u00f2ng ch\u1eef ITviec Blog 5 l\u1ea7n b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng v\u00f2ng l\u1eb7p trong JavaScript. Trong Loop, c\u00e2u l\u1ec7nh ch\u1ec9 c\u1ea7n \u0111\u01b0\u1ee3c vi\u1ebft m\u1ed9t l\u1ea7n v\u00e0 v\u00f2ng l\u1eb7p s\u1ebd th\u1ef1c hi\u1ec7n 5 l\u1ea7n. C\u1ee5 th\u1ec3 nh\u01b0 sau:<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">for<\/span><span style=\"font-weight: 400;\"> (<\/span><span style=\"font-weight: 400;\">let<\/span><span style=\"font-weight: 400;\"> i = <\/span><span style=\"font-weight: 400;\">0<\/span><span style=\"font-weight: 400;\">; i &lt; <\/span><span style=\"font-weight: 400;\">5<\/span><span style=\"font-weight: 400;\">; i++) {<\/span>\r\n<span style=\"font-weight: 400;\">\u00a0 \u00a0 console.<\/span><span style=\"font-weight: 400;\">log<\/span><span style=\"font-weight: 400;\">(<\/span><span style=\"font-weight: 400;\">\"ITviec Blog\"<\/span><span style=\"font-weight: 400;\">);<\/span>\r\n<span style=\"font-weight: 400;\">}<\/span><\/pre>\n<p><span style=\"font-weight: 400;\">Khi th\u1ef1c hi\u1ec7n \u0111o\u1ea1n m\u00e3 tr\u00ean, k\u1ebft qu\u1ea3 s\u1ebd \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb nh\u01b0 sau:<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">ITviec Blog<\/span>\r\n\r\n<span style=\"font-weight: 400;\">ITviec Blog<\/span>\r\n\r\n<span style=\"font-weight: 400;\">ITviec Blog<\/span>\r\n\r\n<span style=\"font-weight: 400;\">ITviec Blog<\/span>\r\n\r\n<span style=\"font-weight: 400;\">ITviec Blog<\/span><\/pre>\n<blockquote><p><i><span style=\"font-weight: 400;\">Xem th\u00eam: <\/span><\/i><strong><a href=\"https:\/\/itviec.com\/blog\/javascript-la-gi\/\"><i>JavaScript l\u00e0 g\u00ec? H\u1ecdc JavaScript c\u01a1 b\u1ea3n v\u1edbi l\u1ed9 tr\u00ecnh d\u1ec5 hi\u1ec3u nh\u1ea5t<\/i><\/a><\/strong><\/p><\/blockquote>\n<h2><span class=\"ez-toc-section\" id=\"Cac_phuong_thuc_co_ban_cua_vong_lap_trong_javascript\"><\/span><b> C\u00e1c ph\u01b0\u01a1ng th\u1ee9c c\u01a1 b\u1ea3n c\u1ee7a v\u00f2ng l\u1eb7p trong javascript<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><b>V\u00f2ng l\u1eb7p trong JavaScript: V\u00f2ng l\u1eb7p for<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Trong JavaScript, v\u00f2ng l\u1eb7p for \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 l\u1eb7p l\u1ea1i m\u1ed9t \u0111o\u1ea1n m\u00e3 theo s\u1ed1 l\u1ea7n nh\u1ea5t \u0111\u1ecbnh ho\u1eb7c l\u1eb7p l\u1ea1i c\u00e1c ph\u1ea7n t\u1eed c\u1ee7a m\u1ed9t m\u1ea3ng. V\u00f2ng l\u1eb7p for ch\u1ee9a v\u00f9ng kh\u1edfi t\u1ea1o, \u0111i\u1ec1u ki\u1ec7n t\u0103ng\/gi\u1ea3m trong m\u1ed9t d\u00f2ng, do \u0111\u00f3 c\u1ea5u tr\u00fac c\u1ee7a v\u00f2ng l\u1eb7p s\u1ebd ng\u1eafn g\u1ecdn v\u00e0 \u00edt l\u1ed7i h\u01a1n.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">C\u00fa ph\u00e1p c\u01a1 b\u1ea3n c\u1ee7a v\u00f2ng l\u1eb7p for:<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">for<\/span><span style=\"font-weight: 400;\"> (initialExpression; condition; updateExpression) {<\/span>\r\n<span style=\"font-weight: 400;\">\u00a0 \u00a0 \/\/ <\/span><span style=\"font-weight: 400;\">for<\/span> <span style=\"font-weight: 400;\">loop<\/span> <span style=\"font-weight: 400;\">body<\/span>\r\n<span style=\"font-weight: 400;\">}<\/span><\/pre>\n<p><span style=\"font-weight: 400;\">Trong \u0111\u00f3:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>initialExpression:<\/b><span style=\"font-weight: 400;\"> Kh\u1edfi t\u1ea1o m\u1ed9t bi\u1ebfn \u0111\u1ebfm.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Condition: <\/b><span style=\"font-weight: 400;\">\u0110i\u1ec1u ki\u1ec7n c\u1ea7n \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1, n\u1ebfu \u0111i\u1ec1u ki\u1ec7n \u0111\u00fang, n\u1ed9i dung c\u1ee7a v\u00f2ng l\u1eb7p s\u1ebd \u0111\u01b0\u1ee3c th\u1ef1c thi.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>UpdateExpression:<\/b><span style=\"font-weight: 400;\"> C\u1eadp nh\u1eadt gi\u00e1 tr\u1ecb c\u1ee7a initialExpression.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Sau khi ho\u00e0n t\u1ea5t m\u1ed9t l\u1ea7n l\u1eb7p c\u1ee7a v\u00f2ng l\u1eb7p, \u0111i\u1ec1u ki\u1ec7n s\u1ebd \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 l\u1ea1i. Qu\u00e1 tr\u00ecnh s\u1ebd \u0111\u01b0\u1ee3c ti\u1ebfp t\u1ee5c cho \u0111\u1ebfn khi \u0111i\u1ec1u ki\u1ec7n sai.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-77832 aligncenter\" src=\"https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/08\/vong-lap-trong-javascript-1-vippro.png\" alt=\"v\u00f2ng l\u1eb7p trong javascript - itviec blog\" width=\"1072\" height=\"1200\" srcset=\"https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/08\/vong-lap-trong-javascript-1-vippro.png 1072w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/08\/vong-lap-trong-javascript-1-vippro-268x300.png 268w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/08\/vong-lap-trong-javascript-1-vippro-768x860.png 572w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/08\/vong-lap-trong-javascript-1-vippro-179x200.png 179w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/08\/vong-lap-trong-javascript-1-vippro-89x100.png 89w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/08\/vong-lap-trong-javascript-1-vippro-402x450.png 402w\" sizes=\"auto, (max-width: 1072px) 100vw, 1072px\" \/><\/p>\n<p style=\"text-align: center;\"><em>C\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a v\u00f2ng l\u1eb7p for (Ngu\u1ed3n: programiz.com).<\/em><\/p>\n<p><span style=\"font-weight: 400;\">V\u00ed d\u1ee5, th\u1ef1c hi\u1ec7n hi\u1ec3n th\u1ecb d\u00e3y s\u1ed1 t\u1eeb 1-5 v\u1edbi \u0111i\u1ec1u ki\u1ec7n gi\u00e1 tr\u1ecb nh\u1ecf h\u01a1n 6. C\u1ee5 th\u1ec3 nh\u01b0 sau:<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">for<\/span><span style=\"font-weight: 400;\"> (let <\/span><span style=\"font-weight: 400;\">i<\/span><span style=\"font-weight: 400;\"> = <\/span><span style=\"font-weight: 400;\">1<\/span><span style=\"font-weight: 400;\">; <\/span><span style=\"font-weight: 400;\">i<\/span><span style=\"font-weight: 400;\"> &lt; <\/span><span style=\"font-weight: 400;\">6<\/span><span style=\"font-weight: 400;\">; <\/span><span style=\"font-weight: 400;\">i<\/span><span style=\"font-weight: 400;\">++) {<\/span>\r\n<span style=\"font-weight: 400;\">\u00a0 \u00a0 console.log(i);<\/span>\r\n<span style=\"font-weight: 400;\">}<\/span><\/pre>\n<p><span style=\"font-weight: 400;\">V\u1edbi c\u00fa ph\u00e1p tr\u00ean, tr\u00ecnh duy\u1ec7t s\u1ebd hi\u1ec3n th\u1ecb d\u00e3y s\u1ed1 t\u1eeb 1-5 l\u00e0 nh\u1eefng gi\u00e1 tr\u1ecb th\u1ecfa m\u00e3n \u0111i\u1ec1u ki\u1ec7n. Khi th\u1ef1c thi, v\u00f2ng l\u1eb7p for s\u1ebd ph\u00e2n t\u00edch t\u1eeb gi\u00e1 tr\u1ecb \u0111\u1ea7u ti\u00ean l\u00e0 s\u1ed1 1 v\u1edbi \u0111i\u1ec1u ki\u1ec7n l\u00e0 i &lt; 6, s\u1ed1 1 th\u1ecfa \u0111i\u1ec1u ki\u1ec7n v\u00f2ng l\u1eb7p s\u1ebd ti\u1ebfp t\u1ee5c ph\u00e2n t\u00edch \u0111\u1ebfn c\u00e1c gi\u00e1 tr\u1ecb 2,3,4,5 v\u00e0 6. \u0110\u1ebfn khi c\u00f3 m\u1ed9t gi\u00e1 tr\u1ecb kh\u00f4ng th\u1ecfa m\u00e3n \u0111i\u1ec1u ki\u1ec7n, v\u00f2ng l\u1eb7p s\u1ebd k\u1ebft th\u00fac.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-77831 aligncenter\" src=\"https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/08\/vong-lap-trong-javascript-2-vippro.png\" alt=\"v\u00f2ng l\u1eb7p trong javascript - itviec blog\" width=\"800\" height=\"370\" srcset=\"https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/08\/vong-lap-trong-javascript-2-vippro.png 800w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/08\/vong-lap-trong-javascript-2-vippro-300x139.png 300w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/08\/vong-lap-trong-javascript-2-vippro-700x324.png 640w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/08\/vong-lap-trong-javascript-2-vippro-200x93.png 200w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/08\/vong-lap-trong-javascript-2-vippro-100x46.png 100w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/p>\n<p style=\"text-align: center;\"><i><span style=\"font-weight: 400;\">C\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a v\u00f2ng l\u1eb7p while (Ngu\u1ed3n: GeeksForGeeks)<\/span><\/i><\/p>\n<h3><b>V\u00f2ng l\u1eb7p trong JavaScript: <\/b><b>V\u00f2ng l\u1eb7p while<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">V\u00f2ng l\u1eb7p while l\u00e0 m\u1ed9t c\u00e2u l\u1ec7nh \u0111i\u1ec1u khi\u1ec3n lu\u1ed3ng cho ph\u00e9p m\u00e3 \u0111\u01b0\u1ee3c th\u1ef1c thi nhi\u1ec1u l\u1ea7n d\u1ef1a tr\u00ean m\u1ed9t \u0111i\u1ec1u ki\u1ec7n boolean nh\u1ea5t \u0111\u1ecbnh. V\u00f2ng l\u1eb7p while c\u0169ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c coi nh\u01b0 m\u1ed9t c\u00e2u l\u1ec7nh if l\u1eb7p l\u1ea1i. C\u00fa ph\u00e1p c\u01a1 b\u1ea3n c\u1ee7a v\u00f2ng l\u1eb7p while nh\u01b0 sau:\u00a0<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">while<\/span><span style=\"font-weight: 400;\"> (<\/span><span style=\"font-weight: 400;\">boolean<\/span><span style=\"font-weight: 400;\"> condition) {<\/span>\r\n<span style=\"font-weight: 400;\">\u00a0 \u00a0 <\/span><span style=\"font-weight: 400;\">loop<\/span><span style=\"font-weight: 400;\"> statements...<\/span>\r\n<span style=\"font-weight: 400;\">}<\/span><\/pre>\n<p><span style=\"font-weight: 400;\">Trong \u0111\u00f3:\u00a0<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">V\u00f2ng l\u1eb7p while b\u1eaft \u0111\u1ea7u b\u1eb1ng vi\u1ec7c ki\u1ec3m tra \u0111i\u1ec1u ki\u1ec7n, n\u1ebfu \u0111i\u1ec1u ki\u1ec7n \u0111\u00fang th\u00ec c\u00e1c c\u00e2u l\u1ec7nh trong v\u00f2ng l\u1eb7p s\u1ebd \u0111\u01b0\u1ee3c th\u1ef1c thi. Ng\u01b0\u1ee3c l\u1ea1i, n\u1ebfu \u0111i\u1ec1u ki\u1ec7n c\u00e2u l\u1ec7nh \u0111\u1ea7u ti\u00ean kh\u00f4ng \u0111\u00fang, th\u00ec c\u00e2u l\u1ec7nh ti\u1ebfp theo s\u1ebd \u0111\u01b0\u1ee3c th\u1ef1c thi.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">C\u00e1c c\u00e2u l\u1ec7nh ch\u1ee9a gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt cho bi\u1ebfn \u0111\u01b0\u1ee3c x\u1eed l\u00fd cho l\u1ea7n l\u1eb7p ti\u1ebfp theo.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Khi \u0111i\u1ec1u ki\u1ec7n sai, v\u00f2ng l\u1eb7p s\u1ebd k\u1ebft th\u00fac.\u00a0<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">V\u00ed d\u1ee5 c\u00e1ch s\u1eed d\u1ee5ng v\u00f2ng l\u1eb7p while khi th\u1ef1c hi\u1ec7n d\u00e3y s\u1ed1 nh\u01b0 sau:<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">let<\/span> <span style=\"font-weight: 400;\">val<\/span><span style=\"font-weight: 400;\"> = <\/span><span style=\"font-weight: 400;\">1<\/span><span style=\"font-weight: 400;\">;<\/span>\r\n\r\n<span style=\"font-weight: 400;\">while<\/span><span style=\"font-weight: 400;\"> (<\/span><span style=\"font-weight: 400;\">val<\/span><span style=\"font-weight: 400;\"> &lt; <\/span><span style=\"font-weight: 400;\">6<\/span><span style=\"font-weight: 400;\">) {<\/span>\r\n<span style=\"font-weight: 400;\">\u00a0 \u00a0 console.log(<\/span><span style=\"font-weight: 400;\">val<\/span><span style=\"font-weight: 400;\">); <\/span>\r\n<span style=\"font-weight: 400;\">\u00a0 \u00a0 <\/span><span style=\"font-weight: 400;\">val<\/span><span style=\"font-weight: 400;\"> += <\/span><span style=\"font-weight: 400;\">1<\/span><span style=\"font-weight: 400;\">;<\/span>\r\n<span style=\"font-weight: 400;\">}<\/span><\/pre>\n<p><span style=\"font-weight: 400;\">K\u1ebft qu\u1ea3 hi\u1ec3n th\u1ecb c\u1ee7a \u0111o\u1ea1n m\u00e3 tr\u00ean:<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-77830\" src=\"https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/08\/vong-lap-trong-javascript-3-vippro.jpg\" alt=\"v\u00f2ng l\u1eb7p trong javascript - itviec blog\" width=\"388\" height=\"211\" srcset=\"https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/08\/vong-lap-trong-javascript-3-vippro.jpg 388w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/08\/vong-lap-trong-javascript-3-vippro-300x163.jpg 300w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/08\/vong-lap-trong-javascript-3-vippro-200x109.jpg 200w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/08\/vong-lap-trong-javascript-3-vippro-100x54.jpg 100w\" sizes=\"auto, (max-width: 388px) 100vw, 388px\" \/><\/p>\n<h3><b>V\u00f2ng l\u1eb7p trong JavaScript: V\u00f2ng l\u1eb7p do\u2026while<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">V\u00f2ng l\u1eb7p do\u2026while c\u00f3 ch\u1ee9c n\u0103ng t\u01b0\u01a1ng t\u1ef1 v\u1edbi while nh\u01b0ng \u0111i\u1ec3m kh\u00e1c bi\u1ec7t ch\u00ednh l\u00e0 do\u2026while s\u1ebd ki\u1ec3m tra \u0111i\u1ec1u ki\u1ec7n sau khi th\u1ef1c thi c\u00e1c c\u00e2u l\u1ec7nh. Do \u0111\u00f3, do\u2026while s\u1ebd th\u1ef1c thi n\u1ed9i dung v\u00f2ng l\u1eb7p \u00edt nh\u1ea5t m\u1ed9t l\u1ea7n ngay c\u1ea3 khi \u0111i\u1ec1u ki\u1ec7n sai.<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">do<\/span><span style=\"font-weight: 400;\"> {<\/span>\r\n<span style=\"font-weight: 400;\">\u00a0 \u00a0 <\/span><span style=\"font-weight: 400;\">Statements<\/span><span style=\"font-weight: 400;\">...<\/span>\r\n<span style=\"font-weight: 400;\">}<\/span>\r\n<span style=\"font-weight: 400;\">while<\/span><span style=\"font-weight: 400;\"> (condition);<\/span><\/pre>\n<p><span style=\"font-weight: 400;\">V\u1edbi c\u00fa ph\u00e1p c\u01a1 b\u1ea3n c\u1ee7a do\u2026while, c\u00f3 th\u1ec3 th\u1ea5y:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">V\u00f2ng l\u1eb7p do\u2026while s\u1ebd b\u1eaft \u0111\u1ea7u th\u1ef1c thi c\u00e1c c\u00e2u l\u1ec7nh, kh\u00f4ng c\u00f3 ki\u1ec3m tra b\u1ea5t k\u1ef3 \u0111i\u1ec1u ki\u1ec7n n\u00e0o l\u1ea7n \u0111\u1ea7u ti\u00ean.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Sau khi th\u1ef1c thi c\u00e1c c\u00e2u l\u1ec7nh v\u00e0 c\u1eadp nh\u1eadt gi\u00e1 tr\u1ecb bi\u1ebfn, \u0111i\u1ec1u ki\u1ec7n s\u1ebd \u0111\u01b0\u1ee3c ki\u1ec3m tra \u0111\u00fang hay sai.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">N\u1ebfu \u0111i\u1ec1u ki\u1ec7n \u0111\u00fang, v\u00f2ng l\u1eb7p ti\u1ebfp theo s\u1ebd b\u1eaft \u0111\u1ea7u. N\u1ebfu \u0111i\u1ec1u ki\u1ec7n sai, v\u00f2ng l\u1eb7p s\u1ebd k\u1ebft th\u00fac.\u00a0<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Ngo\u00e0i ra, c\u1ea7n l\u01b0u \u00fd r\u1eb1ng v\u00f2ng l\u1eb7p do\u2026while s\u1ebd th\u1ef1c thi c\u00e2u l\u1ec7nh \u00edt nh\u1ea5t m\u1ed9t l\u1ea7n tr\u01b0\u1edbc khi b\u1ea5t k\u1ef3 \u0111i\u1ec1u ki\u1ec7n n\u00e0o \u0111\u01b0\u1ee3c ki\u1ec3m tra.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Ch\u1eb3ng h\u1ea1n nh\u01b0 v\u00ed d\u1ee5 t\u00ednh t\u1ed5ng c\u1ee7a c\u00e1c d\u00e3y s\u1ed1 nh\u01b0 sau:\u00a0<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">let<\/span> <span style=\"font-weight: 400;\">sum<\/span><span style=\"font-weight: 400;\"> = <\/span><span style=\"font-weight: 400;\">0<\/span><span style=\"font-weight: 400;\">, <\/span><span style=\"font-weight: 400;\">num<\/span><span style=\"font-weight: 400;\"> = <\/span><span style=\"font-weight: 400;\">0<\/span><span style=\"font-weight: 400;\">;<\/span>\r\n<span style=\"font-weight: 400;\">do<\/span><span style=\"font-weight: 400;\"> {<\/span>\r\n<span style=\"font-weight: 400;\">\u00a0 \u00a0 <\/span><span style=\"font-weight: 400;\">sum<\/span><span style=\"font-weight: 400;\"> += <\/span><span style=\"font-weight: 400;\">num<\/span><span style=\"font-weight: 400;\">;<\/span>\r\n<span style=\"font-weight: 400;\">\u00a0 \u00a0 <\/span><span style=\"font-weight: 400;\">num<\/span><span style=\"font-weight: 400;\"> = parseInt(<\/span><span style=\"font-weight: 400;\">prompt<\/span><span style=\"font-weight: 400;\">(<\/span><span style=\"font-weight: 400;\">\"Enter a number: \"<\/span><span style=\"font-weight: 400;\">));<\/span>\r\n<span style=\"font-weight: 400;\">} <\/span><span style=\"font-weight: 400;\">while<\/span><span style=\"font-weight: 400;\"> (<\/span><span style=\"font-weight: 400;\">num<\/span><span style=\"font-weight: 400;\"> &gt;= <\/span><span style=\"font-weight: 400;\">0<\/span><span style=\"font-weight: 400;\">);<\/span>\r\n<span style=\"font-weight: 400;\">console.<\/span><span style=\"font-weight: 400;\">log<\/span><span style=\"font-weight: 400;\">(`The <\/span><span style=\"font-weight: 400;\">sum<\/span> <span style=\"font-weight: 400;\">is<\/span><span style=\"font-weight: 400;\"> ${<\/span><span style=\"font-weight: 400;\">sum<\/span><span style=\"font-weight: 400;\">}`);<\/span><\/pre>\n<p><span style=\"font-weight: 400;\">\u1ede v\u00ed d\u1ee5 tr\u00ean, do\u2026while nh\u1eafc ng\u01b0\u1eddi d\u00f9ng nh\u1eadp m\u1ed9t s\u1ed1, mi\u1ec5n ch\u00fang l\u00e0 c\u00e1c s\u1ed1 d\u01b0\u01a1ng th\u00ec v\u00f2ng l\u1eb7p s\u1ebd t\u1ef1 c\u1ed9ng ch\u00fang l\u1ea1i v\u00e0 nh\u1eafc user nh\u1eadp th\u00eam c\u00e1c s\u1ed1 kh\u00e1c. Ng\u01b0\u1ee3c l\u1ea1i, n\u1ebfu b\u1ea1n nh\u1eadp s\u1ed1 \u00e2m th\u00ec v\u00f2ng l\u1eb7p s\u1ebd k\u1ebft th\u00fac m\u00e0 kh\u00f4ng \u0111\u01b0\u1ee3c nh\u1eadp th\u00eam b\u1ea5t k\u1ef3 s\u1ed1 \u00e2m n\u00e0o.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">K\u1ebft qu\u1ea3 hi\u1ec3n th\u1ecb:<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-77829\" src=\"https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/08\/vong-lap-trong-javascript-4-vippro.jpg\" alt=\"v\u00f2ng l\u1eb7p trong javascript - itviec blog\" width=\"705\" height=\"136\" srcset=\"https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/08\/vong-lap-trong-javascript-4-vippro.jpg 705w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/08\/vong-lap-trong-javascript-4-vippro-300x58.jpg 300w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/08\/vong-lap-trong-javascript-4-vippro-700x135.jpg 640w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/08\/vong-lap-trong-javascript-4-vippro-200x39.jpg 200w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/08\/vong-lap-trong-javascript-4-vippro-100x19.jpg 100w\" sizes=\"auto, (max-width: 705px) 100vw, 705px\" \/><\/p>\n<h3><b>V\u00f2ng l\u1eb7p trong JavaScript: V\u00f2ng l\u1eb7p for\u2026in<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">V\u00f2ng l\u1eb7p for\u2026in \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 th\u1ef1c hi\u1ec7n h\u00e0nh \u0111\u1ed9ng l\u1eb7p qua c\u00e1c thu\u1ed9c t\u00ednh c\u1ee7a m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng (object). For\u2026in ch\u1ec9 l\u1eb7p qua c\u00e1c gi\u00e1 tr\u1ecb keys c\u1ee7a m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng c\u00f3 thu\u1ed9c t\u00ednh c\u00f3 th\u1ec3 \u0111\u1ebfm \u0111\u01b0\u1ee3c \u0111\u1ec3 \u0111\u1eb7t th\u00e0nh \u201ctrue\u201d.<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">for<\/span><span style=\"font-weight: 400;\">(<\/span><span style=\"font-weight: 400;\">let<\/span> <span style=\"font-weight: 400;\">variable<\/span><span style=\"font-weight: 400;\">_n<\/span><span style=\"font-weight: 400;\">ame <\/span><span style=\"font-weight: 400;\">in<\/span> <span style=\"font-weight: 400;\">object<\/span><span style=\"font-weight: 400;\">_n<\/span><span style=\"font-weight: 400;\">ame) {<\/span>\r\n<span style=\"font-weight: 400;\">\u00a0 \u00a0 <\/span><span style=\"font-weight: 400;\">\/\/ Statement<\/span>\r\n<span style=\"font-weight: 400;\">}<\/span><\/pre>\n<p><span style=\"font-weight: 400;\">V\u00ed d\u1ee5 v\u1ec1 v\u00f2ng l\u1eb7p for\u2026in nh\u01b0 sau:<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">const<\/span><span style=\"font-weight: 400;\"> salaries = {<\/span>\r\n<span style=\"font-weight: 400;\">\u00a0 \u00a0 Jack: <\/span><span style=\"font-weight: 400;\">24000<\/span><span style=\"font-weight: 400;\">,<\/span>\r\n<span style=\"font-weight: 400;\">\u00a0 \u00a0 Paul: <\/span><span style=\"font-weight: 400;\">34000<\/span><span style=\"font-weight: 400;\">,<\/span>\r\n<span style=\"font-weight: 400;\">\u00a0 \u00a0 Monica: <\/span><span style=\"font-weight: 400;\">55000<\/span>\r\n<span style=\"font-weight: 400;\">};<\/span>\r\n<span style=\"font-weight: 400;\">for<\/span><span style=\"font-weight: 400;\"> (<\/span><span style=\"font-weight: 400;\">let<\/span><span style=\"font-weight: 400;\"> i <\/span><span style=\"font-weight: 400;\">in<\/span><span style=\"font-weight: 400;\"> salaries) {<\/span>\r\n<span style=\"font-weight: 400;\">\u00a0 \u00a0 <\/span><span style=\"font-weight: 400;\">let<\/span><span style=\"font-weight: 400;\"> salary = <\/span><span style=\"font-weight: 400;\">\"$\"<\/span><span style=\"font-weight: 400;\"> + salaries[i];<\/span>\r\n<span style=\"font-weight: 400;\">\u00a0 \u00a0 <\/span><span style=\"font-weight: 400;\">console<\/span><span style=\"font-weight: 400;\">.log(<\/span><span style=\"font-weight: 400;\">`${i}: ${salary}`<\/span><span style=\"font-weight: 400;\">);<\/span>\r\n<span style=\"font-weight: 400;\">};<\/span><\/pre>\n<p><span style=\"font-weight: 400;\">\u1ede v\u00ed d\u1ee5 tr\u00ean, c\u00f3 th\u1ec3 th\u1ea5y:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">V\u00f2ng l\u1eb7p for\u2026in \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 l\u1eb7p l\u1ea1i c\u00e1c thu\u1ed9c t\u00ednh c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng salary.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Th\u00eam chu\u1ed7i $ v\u00e0o m\u1ed7i gi\u00e1 tr\u1ecb c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">\u0110o\u1ea1n m\u00e3 s\u1eed d\u1ee5ng bi\u1ebfn i thay v\u00ec key v\u00ec c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng b\u1ea5t k\u1ef3 t\u00ean bi\u1ebfn n\u00e0o, mi\u1ec5n l\u00e0 ch\u00fang h\u1ee3p l\u1ec7.\u00a0<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">K\u1ebft qu\u1ea3 hi\u1ec3n th\u1ecb:<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-77828\" src=\"https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/08\/vong-lap-trong-javascript-5-vippro.jpg\" alt=\"v\u00f2ng l\u1eb7p trong javascript - itviec blog\" width=\"559\" height=\"117\" srcset=\"https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/08\/vong-lap-trong-javascript-5-vippro.jpg 559w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/08\/vong-lap-trong-javascript-5-vippro-300x63.jpg 300w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/08\/vong-lap-trong-javascript-5-vippro-200x42.jpg 200w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/08\/vong-lap-trong-javascript-5-vippro-100x21.jpg 100w\" sizes=\"auto, (max-width: 559px) 100vw, 559px\" \/><\/p>\n<h3><b>V\u00f2ng l\u1eb7p trong JavaScript: V\u00f2ng l\u1eb7p for\u2026of<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">V\u00f2ng l\u1eb7p for\u2026of \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 l\u1eb7p l\u1ea1i c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng c\u00f3 th\u1ec3 l\u1eb7p l\u1ea1i, ch\u1eb3ng h\u1ea1n nh\u01b0 m\u1ea3ng (array), \u0111\u1ed1i t\u01b0\u1ee3ng (object), set ho\u1eb7c map. V\u00f2ng l\u1eb7p s\u1ebd l\u1eb7p l\u1ea1i tr\u1ef1c ti\u1ebfp gi\u00e1 tr\u1ecb c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u00e3 cho v\u00e0 c\u00f3 c\u00fa ph\u00e1p ng\u1eafn g\u1ecdn h\u01a1n v\u00f2ng l\u1eb7p for.\u00a0<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">for<\/span><span style=\"font-weight: 400;\">(<\/span><span style=\"font-weight: 400;\">let<\/span> <span style=\"font-weight: 400;\">variable<\/span><span style=\"font-weight: 400;\">_n<\/span><span style=\"font-weight: 400;\">ame <\/span><span style=\"font-weight: 400;\">of<\/span><span style=\"font-weight: 400;\">\u00a0 <\/span><span style=\"font-weight: 400;\">object<\/span><span style=\"font-weight: 400;\">_n<\/span><span style=\"font-weight: 400;\">ame) {<\/span>\r\n<span style=\"font-weight: 400;\">\u00a0 \u00a0 <\/span><span style=\"font-weight: 400;\">\/\/ Statement<\/span>\r\n<span style=\"font-weight: 400;\">}<\/span><\/pre>\n<p><span style=\"font-weight: 400;\">V\u00ed d\u1ee5 v\u1ec1 c\u00e1ch s\u1eed d\u1ee5ng for\u2026of nh\u01b0 sau:\u00a0<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">const<\/span><span style=\"font-weight: 400;\"> students = [<\/span><span style=\"font-weight: 400;\">'John'<\/span><span style=\"font-weight: 400;\">, <\/span><span style=\"font-weight: 400;\">'Sara'<\/span><span style=\"font-weight: 400;\">, <\/span><span style=\"font-weight: 400;\">'Jack'<\/span><span style=\"font-weight: 400;\">];<\/span>\r\n<span style=\"font-weight: 400;\">for<\/span><span style=\"font-weight: 400;\"> (<\/span><span style=\"font-weight: 400;\">let<\/span><span style=\"font-weight: 400;\"> element <\/span><span style=\"font-weight: 400;\">of<\/span><span style=\"font-weight: 400;\"> students) {<\/span>\r\n<span style=\"font-weight: 400;\">\u00a0 \u00a0 <\/span><span style=\"font-weight: 400;\">console<\/span><span style=\"font-weight: 400;\">.log(element);<\/span>\r\n<span style=\"font-weight: 400;\">}<\/span><\/pre>\n<p><span style=\"font-weight: 400;\">\u1ede v\u00ed d\u1ee5 tr\u00ean \u0111\u00e3 th\u1ef1c hi\u1ec7n v\u00f2ng l\u1eb7p for\u2026of \u0111\u1ed1i v\u1edbi m\u1ea3ng (array), c\u1ee5 th\u1ec3 l\u00e0 l\u1eb7p qua c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng m\u1ea3ng l\u00e0 student v\u00e0 hi\u1ec3n th\u1ecb t\u1ea5t c\u1ea3 c\u00e1c gi\u00e1 tr\u1ecb c\u1ee7a n\u00f3.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">K\u1ebft qu\u1ea3 hi\u1ec3n th\u1ecb:<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-77827\" src=\"https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/08\/vong-lap-trong-javascript-6-vippro.jpg\" alt=\"v\u00f2ng l\u1eb7p trong javascript - itviec blog\" width=\"600\" height=\"114\" srcset=\"https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/08\/vong-lap-trong-javascript-6-vippro.jpg 600w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/08\/vong-lap-trong-javascript-6-vippro-300x57.jpg 300w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/08\/vong-lap-trong-javascript-6-vippro-200x38.jpg 200w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/08\/vong-lap-trong-javascript-6-vippro-100x19.jpg 100w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/p>\n<h3><b>V\u00f2ng l\u1eb7p trong JavaScript: Break Statement<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">C\u00e2u l\u1ec7nh break \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ch\u1ea5m d\u1ee9t vi\u1ec7c th\u1ef1c thi v\u00f2ng l\u1eb7p ho\u1eb7c c\u00e2u l\u1ec7nh switch khi \u0111i\u1ec1u ki\u1ec7n \u0111\u00fang. V\u00ed d\u1ee5 nh\u01b0 sau:\u00a0<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">for<\/span><span style=\"font-weight: 400;\"> (<\/span><span style=\"font-weight: 400;\">let<\/span><span style=\"font-weight: 400;\"> i = <\/span><span style=\"font-weight: 400;\">1<\/span><span style=\"font-weight: 400;\">; i &lt; <\/span><span style=\"font-weight: 400;\">6<\/span><span style=\"font-weight: 400;\">; i++) {<\/span>\r\n<span style=\"font-weight: 400;\">\u00a0 \u00a0 <\/span><span style=\"font-weight: 400;\">if<\/span><span style=\"font-weight: 400;\"> (i == <\/span><span style=\"font-weight: 400;\">4<\/span><span style=\"font-weight: 400;\">) <\/span>\r\n<span style=\"font-weight: 400;\">\u00a0 \u00a0 \u00a0 \u00a0 <\/span><span style=\"font-weight: 400;\">break<\/span><span style=\"font-weight: 400;\">;<\/span>\r\n<span style=\"font-weight: 400;\">\u00a0 \u00a0 \u00a0 \u00a0 <\/span>\r\n<span style=\"font-weight: 400;\">\u00a0 \u00a0 console.<\/span><span style=\"font-weight: 400;\">log<\/span><span style=\"font-weight: 400;\">(i);<\/span>\r\n<span style=\"font-weight: 400;\">}<\/span><\/pre>\n<p><span style=\"font-weight: 400;\">\u1ede v\u00ed d\u1ee5 tr\u00ean, c\u00f3 th\u1ec3 th\u1ea5y nh\u01b0 sau:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">V\u00f2ng l\u1eb7p b\u1eaft \u0111\u1ea7u v\u1edbi i=1 v\u00e0 ti\u1ebfp t\u1ee5c cho \u0111\u1ebfn khi gi\u00e1 tr\u1ecb i nh\u1ecf h\u01a1n 6.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Khi i b\u1eb1ng 4, c\u00e2u l\u1ec7nh break \u0111\u01b0\u1ee3c th\u1ef1c thi, \u0111i\u1ec1u n\u00e0y s\u1ebd d\u1eebng v\u00f2ng l\u1eb7p ngay l\u1eadp t\u1ee9c.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">C\u00e1c gi\u00e1 tr\u1ecb c\u1ee7a i t\u1eeb 1 \u0111\u1ebfn 3 s\u1ebd \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb. Khi \u0111\u1ebfn gi\u00e1 tr\u1ecb i b\u1eb1ng 4, v\u00f2ng l\u1eb7p s\u1ebd d\u1eebng l\u1ea1i tr\u01b0\u1edbc khi i=4 \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">K\u1ebft qu\u1ea3 hi\u1ec3n th\u1ecb:<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-77826\" src=\"https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/08\/vong-lap-trong-javascript-7-vippro.jpg\" alt=\"v\u00f2ng l\u1eb7p trong javascript - itviec blog\" width=\"357\" height=\"136\" srcset=\"https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/08\/vong-lap-trong-javascript-7-vippro.jpg 357w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/08\/vong-lap-trong-javascript-7-vippro-300x114.jpg 300w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/08\/vong-lap-trong-javascript-7-vippro-200x76.jpg 200w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/08\/vong-lap-trong-javascript-7-vippro-100x38.jpg 100w\" sizes=\"auto, (max-width: 357px) 100vw, 357px\" \/><\/p>\n<h3><b>V\u00f2ng l\u1eb7p trong JavaScript: Continue Statement<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">C\u00e2u l\u1ec7nh continue \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 b\u1ecf qua ph\u1ea7n c\u00f2n l\u1ea1i c\u1ee7a v\u00f2ng l\u1eb7p hi\u1ec7n t\u1ea1i v\u00e0 ti\u1ebfp t\u1ee5c v\u1edbi v\u00f2ng l\u1eb7p ti\u1ebfp theo.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">C\u00e2u l\u1ec7nh continue kh\u00e1c bi\u1ec7t so v\u1edbi c\u00e2u l\u1ec7nh break \u1edf m\u1ed9t s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m nh\u01b0:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">C\u00e2u l\u1ec7nh continue s\u1ebd d\u1eebng ho\u00e0n to\u00e0n v\u00f2ng l\u1eb7p v\u00e0 ti\u1ebfp t\u1ee5c th\u1ef1c thi m\u00e3 sau v\u00f2ng l\u1eb7p.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Trong khi \u0111\u00f3, c\u00e2u l\u1ec7nh break s\u1ebd b\u1ecf qua ph\u1ea7n c\u00f2n l\u1ea1i c\u1ee7a v\u00f2ng l\u1eb7p hi\u1ec7n t\u1ea1i, ti\u1ebfp t\u1ee5c v\u1edbi v\u00f2ng l\u1eb7p ti\u1ebfp theo m\u00e0 kh\u00f4ng d\u1eebng ho\u00e0n to\u00e0n v\u00f2ng l\u1eb7p.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Ch\u1eb3ng h\u1ea1n nh\u01b0 v\u00ed d\u1ee5 sau:<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">for<\/span><span style=\"font-weight: 400;\"> (<\/span><span style=\"font-weight: 400;\">let<\/span><span style=\"font-weight: 400;\"> i = <\/span><span style=\"font-weight: 400;\">0<\/span><span style=\"font-weight: 400;\">; i &lt; <\/span><span style=\"font-weight: 400;\">11<\/span><span style=\"font-weight: 400;\">; i++) {<\/span>\r\n<span style=\"font-weight: 400;\">\u00a0 \u00a0 <\/span><span style=\"font-weight: 400;\">if<\/span><span style=\"font-weight: 400;\"> (i % <\/span><span style=\"font-weight: 400;\">2<\/span><span style=\"font-weight: 400;\"> == <\/span><span style=\"font-weight: 400;\">0<\/span><span style=\"font-weight: 400;\">) <\/span>\r\n<span style=\"font-weight: 400;\">\u00a0 \u00a0 \u00a0 \u00a0 <\/span><span style=\"font-weight: 400;\">continue<\/span><span style=\"font-weight: 400;\">;<\/span>\r\n<span style=\"font-weight: 400;\">\u00a0 \u00a0 \u00a0 \u00a0 <\/span>\r\n<span style=\"font-weight: 400;\">\u00a0 \u00a0 console.<\/span><span style=\"font-weight: 400;\">log<\/span><span style=\"font-weight: 400;\">(i);<\/span>\r\n<span style=\"font-weight: 400;\">}<\/span><\/pre>\n<p><span style=\"font-weight: 400;\">\u1ede v\u00ed d\u1ee5 tr\u00ean, gi\u00e1 tr\u1ecb c\u1ee7a i \u0111\u01b0\u1ee3c t\u0103ng l\u00ean cho l\u1ea7n l\u1eb7p ti\u1ebfp theo, sau \u0111\u00f3 c\u00e2u l\u1ec7nh continue s\u1ebd b\u1ecf qua l\u1ea7n l\u1eb7p hi\u1ec7n t\u1ea1i. L\u01b0u \u00fd r\u1eb1ng \u0111o\u1ea1n m\u00e3 tr\u00ean \u0111\u00e3 t\u0103ng gi\u00e1 tr\u1ecb c\u1ee7a i c\u1ea3 b\u00ean trong v\u00e0 b\u00ean ngo\u00e0i c\u00e2u l\u1ec7nh if.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">K\u1ebft qu\u1ea3 hi\u1ec3n th\u1ecb:<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-77825\" src=\"https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/08\/vong-lap-trong-javascript-8-vippro.jpg\" alt=\"v\u00f2ng l\u1eb7p trong javascript - itviec blog\" width=\"489\" height=\"222\" srcset=\"https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/08\/vong-lap-trong-javascript-8-vippro.jpg 489w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/08\/vong-lap-trong-javascript-8-vippro-300x136.jpg 300w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/08\/vong-lap-trong-javascript-8-vippro-200x91.jpg 200w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/08\/vong-lap-trong-javascript-8-vippro-100x45.jpg 100w\" sizes=\"auto, (max-width: 489px) 100vw, 489px\" \/><\/p>\n<h3><b>V\u00f2ng l\u1eb7p trong JavaScript: Infinite Loop\u00a0<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">V\u00f2ng l\u1eb7p v\u00f4 h\u1ea1n (hay c\u00f2n g\u1ecdi l\u00e0 Infinite Loop) l\u00e0 m\u1ed9t trong nh\u1eefng l\u1ed7i sai ph\u1ed5 bi\u1ebfn khi tri\u1ec3n khai b\u1ea5t k\u1ef3 lo\u1ea1i v\u00f2ng l\u1eb7p n\u00e0o, b\u1edfi ch\u00fang c\u00f3 th\u1ec3 kh\u00f4ng bao gi\u1edd tho\u00e1t, t\u1ee9c l\u00e0 v\u00f2ng l\u1eb7p s\u1ebd ch\u1ea1y v\u00f4 h\u1ea1n l\u1ea7n. \u0110i\u1ec1u n\u00e0y x\u1ea3y ra khi \u0111i\u1ec1u ki\u1ec7n kh\u00f4ng th\u00e0nh c\u00f4ng v\u00ec m\u1ed9t l\u00fd do n\u00e0o \u0111\u00f3.<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">for<\/span><span style=\"font-weight: 400;\"> (<\/span><span style=\"font-weight: 400;\">let<\/span><span style=\"font-weight: 400;\"> i = <\/span><span style=\"font-weight: 400;\">5<\/span><span style=\"font-weight: 400;\">; i != <\/span><span style=\"font-weight: 400;\">0<\/span><span style=\"font-weight: 400;\">; i -= <\/span><span style=\"font-weight: 400;\">2<\/span><span style=\"font-weight: 400;\">) {<\/span>\r\n<span style=\"font-weight: 400;\">\u00a0 \u00a0 console.<\/span><span style=\"font-weight: 400;\">log<\/span><span style=\"font-weight: 400;\">(i);<\/span>\r\n<span style=\"font-weight: 400;\">}<\/span>\r\n\r\n<span style=\"font-weight: 400;\">let<\/span><span style=\"font-weight: 400;\"> x = <\/span><span style=\"font-weight: 400;\">5<\/span><span style=\"font-weight: 400;\">;<\/span>\r\n<span style=\"font-weight: 400;\">while<\/span><span style=\"font-weight: 400;\"> (x == <\/span><span style=\"font-weight: 400;\">5<\/span><span style=\"font-weight: 400;\">) {<\/span>\r\n<span style=\"font-weight: 400;\">\u00a0 \u00a0 console.<\/span><span style=\"font-weight: 400;\">log<\/span><span style=\"font-weight: 400;\">(<\/span><span style=\"font-weight: 400;\">\"In the loop\"<\/span><span style=\"font-weight: 400;\">);<\/span>\r\n<span style=\"font-weight: 400;\">}<\/span><\/pre>\n<h2><span class=\"ez-toc-section\" id=\"Cau_hoi_thuong_gap_ve_vong_lap_trong_JavaScript\"><\/span><b>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 v\u00f2ng l\u1eb7p trong JavaScript<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><b>V\u00f2ng l\u1eb7p while v\u00e0 do\u2026while kh\u00e1c nhau nh\u01b0 th\u1ebf n\u00e0o?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">V\u00f2ng l\u1eb7p while v\u00e0 do\u2026while \u0111\u1ec1u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 th\u1ef1c hi\u1ec7n c\u00e2u l\u1ec7nh nhi\u1ec1u l\u1ea7n cho \u0111\u1ebfn khi \u0111i\u1ec1u ki\u1ec7n kh\u00f4ng c\u00f2n \u0111\u00fang. Tuy nhi\u00ean, c\u1ea3 hai v\u1eabn c\u00f3 m\u1ed9t s\u1ed1 \u0111i\u1ec3m kh\u00e1c bi\u1ec7t nh\u01b0:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>V\u00f2ng l\u1eb7p while<\/b><span style=\"font-weight: 400;\">: Th\u01b0\u1eddng ki\u1ec3m tra \u0111i\u1ec1u ki\u1ec7n tr\u01b0\u1edbc khi \u0111o\u1ea1n m\u00e3 \u0111\u01b0\u1ee3c th\u1ef1c thi.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>V\u00f2ng l\u1eb7p do\u2026while: <\/b><span style=\"font-weight: 400;\">S\u1ebd th\u1ef1c thi \u0111o\u1ea1n m\u00e3 m\u1ed9t l\u1ea7n tr\u01b0\u1edbc khi ki\u1ec3m tra \u0111i\u1ec1u ki\u1ec7n.<\/span><\/li>\n<\/ul>\n<h3><b>L\u00e0m sao \u0111\u1ec3 tr\u00e1nh v\u00f2ng l\u1eb7p v\u00f4 h\u1ea1n (Infinite Loop)?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">V\u00f2ng l\u1eb7p v\u00f4 h\u1ea1n (Infinite Loop) x\u1ea3y ra khi \u0111i\u1ec1u ki\u1ec7n k\u1ebft th\u00fac (Terminating condition) c\u1ee7a v\u00f2ng l\u1eb7p kh\u00f4ng \u0111\u01b0\u1ee3c \u0111\u00e1p \u1ee9ng, khi\u1ebfn cho v\u00f2ng l\u1eb7p ch\u1ea1y v\u00f4 th\u1eddi h\u1ea1n. \u0110\u1ec3 tr\u00e1nh t\u00ecnh tr\u1ea1ng n\u00e0y, b\u1ea1n c\u1ea7n \u0111\u1ea3m b\u1ea3o \u0111i\u1ec1u ki\u1ec7n cu\u1ed1i c\u00f9ng c\u1ee7a v\u00f2ng l\u1eb7p l\u00e0 sai (False).<\/span><\/p>\n<h3><b>S\u1ef1 kh\u00e1c nhau gi\u1eefa for\u2026in v\u00e0 for\u2026of<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">M\u1ed9t s\u1ed1 \u0111i\u1ec3m kh\u00e1c nhau gi\u1eefa for\u2026in v\u00e0 for\u2026of c\u1ee5 th\u1ec3 nh\u01b0:<\/span><\/p>\n<table>\n<tbody>\n<tr>\n<td><b>for\u2026in<\/b><\/td>\n<td><b>for\u2026of<\/b><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 l\u1eb7p qua c\u00e1c kh\u00f3a (keys) c\u1ee7a m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng<\/span><\/td>\n<td><span style=\"font-weight: 400;\">\u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 l\u1eb7p qua c\u00e1c gi\u00e1 tr\u1ecb c\u1ee7a m\u1ed9t iterable.<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">C\u00f3 th\u1ec3 s\u1eed d\u1ee5ng for\u2026in \u0111\u1ec3 l\u1eb7p qua m\u1ed9t iterable nh\u01b0 m\u1ea3ng, chu\u1ed7i. Tuy nhi\u00ean, tr\u00e1nh s\u1eed d\u1ee5ng for\u2026in cho c\u00e1c iterable.<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Kh\u00f4ng th\u1ec3 s\u1eed d\u1ee5ng \u0111\u1ec3 l\u1eb7p qua m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng.<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2><span class=\"ez-toc-section\" id=\"Tong_ket\"><\/span><b>T\u1ed5ng k\u1ebft<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><b>V\u00f2ng l\u1eb7p trong <\/b><span style=\"font-weight: 400;\">JavaScript l\u00e0 m\u1ed9t c\u1ea5u tr\u00fac linh ho\u1ea1t gi\u00fap c\u00e1c l\u1eadp tr\u00ecnh vi\u00ean t\u1ef1 \u0111\u1ed9ng h\u00f3a c\u00e1c t\u00e1c v\u1ee5 l\u1eb7p \u0111i l\u1eb7p l\u1ea1i. B\u1eb1ng c\u00e1ch hi\u1ec3u r\u00f5 c\u00e1c lo\u1ea1i v\u00f2ng l\u1eb7p kh\u00e1c nhau nh\u01b0 for, while hay do\u2026while v\u00e0 c\u00e1ch s\u1eed d\u1ee5ng ch\u00fang m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3, b\u1ea1n c\u00f3 th\u1ec3 vi\u1ebft \u0111\u01b0\u1ee3c nh\u1eefng \u0111o\u1ea1n code JavaScript ng\u1eafn g\u1ecdn v\u00e0 t\u1ed1i \u01b0u d\u1ec5 d\u00e0ng.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u0110\u1eebng qu\u00ean th\u1ef1c h\u00e0nh th\u00eam v\u1ec1 c\u00e1c <\/span><b>v\u00f2ng l\u1eb7p trong <\/b><span style=\"font-weight: 400;\">JavaScript qua c\u00e1c d\u1ef1 \u00e1n th\u1ef1c t\u1ebf \u0111\u1ec3 n\u00e2ng cao tr\u00ecnh \u0111\u1ed9 c\u0169ng nh\u01b0 \u0111\u1ea1t \u0111\u01b0\u1ee3c nh\u1eefng c\u01a1 h\u1ed9i ngh\u1ec1 nghi\u1ec7p h\u1ea5p d\u1eabn b\u1ea1n nh\u00e9!<\/span><\/p>\n<p>B\u1ea1n c\u00f3 th\u1ec3 tham kh\u1ea3o chu\u1ed7i b\u00e0i vi\u1ebft v\u1ec1 ch\u1ee7 \u0111\u1ec1 JavaScript tr\u00ean ITviec:<\/p>\n<ul>\n<li><a href=\"https:\/\/itviec.com\/blog\/javascript-la-gi\/\" target=\"_blank\" rel=\"noopener\">JavaScript l\u00e0 g\u00ec? H\u1ecdc JavaScript c\u01a1 b\u1ea3n v\u1edbi l\u1ed9 tr\u00ecnh d\u1ec5 hi\u1ec3u nh\u1ea5t<\/a><\/li>\n<li><a href=\"https:\/\/itviec.com\/blog\/prototype-trong-javascript-la-gi\/\" target=\"_blank\" rel=\"noopener\">Prototype trong Javascript: \u0110\u1ecbnh ngh\u0129a, Ph\u00e2n lo\u1ea1i v\u00e0 C\u00e1ch s\u1eed d\u1ee5ng<\/a><\/li>\n<li><a href=\"https:\/\/itviec.com\/blog\/jquery-la-gi\/\" target=\"_blank\" rel=\"noopener\">Nh\u1eefng \u0111i\u1ec1u c\u1ea7n bi\u1ebft v\u1ec1 jQuery \u2013 Th\u01b0 vi\u1ec7n Javascript h\u00e0ng \u0111\u1ea7u<\/a><\/li>\n<li><a href=\"https:\/\/itviec.com\/blog\/tu-hoc-javascript\/\" target=\"_blank\" rel=\"noopener\">T\u1ef1 h\u1ecdc Javascript v\u1edbi 20+ t\u00e0i nguy\u00ean online c\u01a1 b\u1ea3n \u0111\u1ebfn n\u00e2ng cao<\/a><\/li>\n<li><a href=\"https:\/\/itviec.com\/blog\/bai-tap-javascript-co-ban\/\" target=\"_blank\" rel=\"noopener\">B\u00e0i t\u1eadp JavaScript c\u01a1 b\u1ea3n k\u00e8m l\u1eddi gi\u1ea3i cho ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u<\/a><\/li>\n<li><a href=\"https:\/\/itviec.com\/blog\/foreach-javascript-la-gi\/\" target=\"_blank\" rel=\"noopener\">forEach JavaScript: M\u1ed9t s\u1ed1 thao t\u00e1c c\u01a1 b\u1ea3n v\u00e0 v\u00ed d\u1ee5 chi ti\u1ebft<\/a><\/li>\n<li><a href=\"https:\/\/itviec.com\/blog\/array-javascript-la-gi\/\" target=\"_blank\" rel=\"noopener\">Array JavaScript: T\u1ed5ng h\u1ee3p 12 ph\u01b0\u01a1ng th\u1ee9c quan tr\u1ecdng c\u1ee7a array<\/a><\/li>\n<\/ul>\n<blockquote><p><em>Xem th\u00eam: <\/em><strong><a href=\"https:\/\/itviec.com\/blog\/javascript-developer\/\"><i>JavaScript Developer l\u00e0 g\u00ec? C\u00e1c h\u01b0\u1edbng ph\u00e1t tri\u1ec3n c\u1ee7aJavaScript Developer<\/i><\/a><\/strong><\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>V\u00f2ng l\u1eb7p l\u00e0 m\u1ed9t trong nh\u1eefng ph\u01b0\u01a1ng th\u1ee9c c\u01a1 b\u1ea3n trong l\u1eadp tr\u00ecnh JavaScript, gi\u00fap t\u1ef1 \u0111\u1ed9ng h\u00f3a c\u00e1c t\u00e1c v\u1ee5 l\u1eb7p \u0111i l\u1eb7p l\u1ea1i. Hi\u1ec3u r\u00f5 v\u1ec1 ph\u01b0\u01a1ng th\u1ee9c v\u00f2ng l\u1eb7p trong JavaScript s\u1ebd gi\u00fap b\u1ea1n d\u1ec5 d\u00e0ng th\u1ef1c hi\u1ec7n \u0111o\u1ea1n m\u00e3 v\u00e0 th\u1ef1c thi ch\u00fang. \u0110\u1ecdc b\u00e0i vi\u1ebft sau \u0111\u00e2y \u0111\u1ec3 \u0111\u01b0\u1ee3c gi\u1ea3i [&hellip;]<\/p>\n","protected":false},"author":207,"featured_media":77914,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_gspb_post_css":"","footnotes":""},"categories":[109],"tags":[],"class_list":["post-77782","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-chuyen-mon-it"],"blocksy_meta":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.8 (Yoast SEO v27.7) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>V\u00f2ng l\u1eb7p trong JavaScript: Chi ti\u1ebft 8 ph\u01b0\u01a1ng th\u1ee9c l\u1eb7p k\u00e8m v\u00ed d\u1ee5 - ITviec Blog<\/title>\n<meta name=\"description\" content=\"V\u00f2ng l\u1eb7p trong JavaScript \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 x\u1eed l\u00fd c\u00e1c t\u00e1c v\u1ee5 l\u1eb7p \u0111i l\u1eb7p l\u1ea1i. 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