{"id":3130,"date":"2016-07-04T10:32:41","date_gmt":"2016-07-04T10:32:41","guid":{"rendered":"https:\/\/kiencang.net\/?p=3130"},"modified":"2016-07-04T10:32:41","modified_gmt":"2016-07-04T10:32:41","slug":"cac-phep-toan-trong-javascript","status":"publish","type":"post","link":"https:\/\/kiencang.net\/cac-phep-toan-trong-javascript\/","title":{"rendered":"C\u00e1c ph\u00e9p to\u00e1n trong JavaScript"},"content":{"rendered":"\n<p>M\u1ed9t ph\u1ea7n bao gi\u1edd c\u0169ng quan tr\u1ecdng trong b\u1ea5t c\u1ee9 ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh n\u00e0o, \u0111\u00f3 l\u00e0 thao t\u00e1c tr\u00ean c\u00e1c con s\u1ed1. H\u00f4m nay ch\u00fang ta s\u1ebd xem \u0111i\u1ec1u \u1ea5y trong JavaScript.<\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_60 counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title \" >M\u1ee5c l\u1ee5c<\/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\" role=\"button\"><label for=\"item-6577d6b198def\" ><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><\/label><input aria-label=\"Toggle\" aria-label=\"item-6577d6b198def\"  type=\"checkbox\" id=\"item-6577d6b198def\"><\/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:\/\/kiencang.net\/cac-phep-toan-trong-javascript\/#Cac_toan_tu_so_hoc_trong_JavaScript\" title=\"C\u00e1c to\u00e1n t\u1eed s\u1ed1 h\u1ecdc trong JavaScript\">C\u00e1c to\u00e1n t\u1eed s\u1ed1 h\u1ecdc trong JavaScript<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/kiencang.net\/cac-phep-toan-trong-javascript\/#Toan_tu_va_toan_hang\" title=\"To\u00e1n t\u1eed v\u00e0 to\u00e1n h\u1ea1ng\">To\u00e1n t\u1eed v\u00e0 to\u00e1n h\u1ea1ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/kiencang.net\/cac-phep-toan-trong-javascript\/#Phep_tinh_uu_tien\" title=\"Ph\u00e9p t\u00ednh \u01b0u ti\u00ean\">Ph\u00e9p t\u00ednh \u01b0u ti\u00ean<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/kiencang.net\/cac-phep-toan-trong-javascript\/#Gia_tri_cua_bieu_thuc_uu_tien_trong_JavaScript\" title=\"Gi\u00e1 tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c \u01b0u ti\u00ean trong JavaScript\">Gi\u00e1 tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c \u01b0u ti\u00ean trong JavaScript<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cac_toan_tu_so_hoc_trong_JavaScript\"><\/span>C\u00e1c to\u00e1n t\u1eed s\u1ed1 h\u1ecdc trong JavaScript<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>N\u00f3 c\u00f3 th\u1ec3 l\u00e0m vi\u1ec7c tr\u00ean c\u00e1c con s\u1ed1 th\u1ef1c s\u1ef1, ho\u1eb7c c\u00e1c bi\u1ebfn ch\u1ee9a gi\u00e1 tr\u1ecb s\u1ed1.<\/p>\n\n\n\n<figure class=\"wp-block-table w3-table-all notranslate\"><table><tbody><tr><th>To\u00e1n t\u1eed<\/th><th>M\u00f4 t\u1ea3<\/th><\/tr><tr><td>+<\/td><td>C\u1ed9ng<\/td><\/tr><tr><td>&#8211;<\/td><td>Tr\u1eeb<\/td><\/tr><tr><td>*<\/td><td>Nh\u00e2n<\/td><\/tr><tr><td>\/<\/td><td>Chia<\/td><\/tr><tr><td>%<\/td><td>M\u00f4 \u0111un<\/td><\/tr><tr><td>++<\/td><td>C\u1ed9ng 1<\/td><\/tr><tr><td>&#8212;<\/td><td>Tr\u1eeb 1<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Thao t\u00e1c tr\u00ean 2 s\u1ed1 th\u1ef1c s\u1ef1:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">V\u00ed d\u1ee5<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>var x = 100 + 50;<\/code><\/pre>\n\n\n\n<p>ho\u1eb7c tr\u00ean c\u00e1c bi\u1ebfn:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">V\u00ed d\u1ee5<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>var x = a + b;<\/code><\/pre>\n\n\n\n<p>ho\u1eb7c m\u1ed9t bi\u1ec3u th\u1ee9c:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">V\u00ed d\u1ee5<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>var x = (100 + 50) * a;<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Toan_tu_va_toan_hang\"><\/span>To\u00e1n t\u1eed v\u00e0 to\u00e1n h\u1ea1ng<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>C\u00e1c con s\u1ed1 trong bi\u1ec3u th\u1ee9c to\u00e1n h\u1ecdc \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 <strong>to\u00e1n h\u1ea1ng<\/strong>.<\/p>\n\n\n\n<p>C\u00e1c ph\u00e9p t\u00ednh (n\u1eb1m gi\u1eefa hai to\u00e1n h\u1ea1ng) \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 <strong>to\u00e1n t\u1eed<\/strong>.<\/p>\n\n\n\n<figure class=\"wp-block-table w3-table-all\"><table><tbody><tr><th>To\u00e1n h\u1ea1ng<\/th><th>To\u00e1n t\u1eed<\/th><th>To\u00e1n h\u1ea1ng<\/th><\/tr><tr><td>87<\/td><td>+<\/td><td>89<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Ph\u00e9p c\u1ed9ng<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>var x = 8;\nvar y = 7;\nvar z = x + y;<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Ph\u00e9p tr\u1eeb<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>var x = 8;\nvar y = 7;\nvar z = x - y;<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Ph\u00e9p nh\u00e2n<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>var x = 8;\nvar y = 7;\nvar z = x * y;<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Ph\u00e9p chia<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>var x = 8;\nvar y = 7;\nvar z = x \/ y;<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">M\u00f4 \u0111un (l\u1ea5y ph\u1ea7n d\u01b0)<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>var x = 5;\nvar y = 2;\nvar z = x % y;<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">C\u1ed9ng th\u00eam 1<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>var x = 5;\nx++;\nvar z = x;<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Tr\u1eeb \u0111i 1<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>var x = 5;\nx--;\nvar z = x;<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Phep_tinh_uu_tien\"><\/span>Ph\u00e9p t\u00ednh \u01b0u ti\u00ean<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Ph\u00e9p t\u00ednh \u01b0u ti\u00ean m\u00f4 t\u1ea3 th\u1ee9 t\u1ef1 c\u00e1c ph\u00e9p t\u00ednh \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n trong bi\u1ec3u th\u1ee9c to\u00e1n h\u1ecdc.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">V\u00ed d\u1ee5<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>var x = 100 + 50 * 3;<\/code><\/pre>\n\n\n\n<p>K\u1ebft qu\u1ea3 c\u1ee7a v\u00ed d\u1ee5 tr\u00ean s\u1ebd l\u00e0 150 * 3 hay 100 + 150?<\/p>\n\n\n\n<p>Ph\u00e9p c\u1ed9ng \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n tr\u01b0\u1edbc hay ph\u00e9p nh\u00e2n?<\/p>\n\n\n\n<p>N\u1ebfu b\u1ea1n nh\u1edb l\u1ea1i m\u00f4n to\u00e1n ng\u00e0y x\u01b0a \u0111\u01b0\u1ee3c d\u1ea1y h\u1ed3i c\u1ea5p hai (ho\u1eb7c cu\u1ed1i c\u1ea5p m\u1ed9t), th\u00ec s\u1ebd bi\u1ebft l\u00e0 ph\u00e9p nh\u00e2n \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n tr\u01b0\u1edbc, JavaScript c\u0169ng y nh\u01b0 v\u1eady.<\/p>\n\n\n\n<p>Ph\u00e9p nh\u00e2n (*) v\u00e0 ph\u00e9p chia (\/) \u0111\u01b0\u1ee3c \u01b0u ti\u00ean cao h\u01a1n so v\u1edbi ph\u00e9p c\u1ed9ng (+) v\u00e0 ph\u00e9p tr\u1eeb (-).<\/p>\n\n\n\n<p>Th\u1ee9 t\u1ef1 \u01b0u ti\u00ean tr\u00ean c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c thay \u0111\u1ed5i khi b\u1ea1n s\u1eed d\u1ee5ng d\u1ea5u ngo\u1eb7c \u0111\u01a1n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">V\u00ed d\u1ee5<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>var x = (100 + 50) * 3;<\/code><\/pre>\n\n\n\n<p>Khi d\u1ea5u ngo\u1eb7c \u0111\u01a1n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng, ph\u00e9p to\u00e1n b\u00ean trong d\u1ea5u ngo\u1eb7c \u0111\u01a1n s\u1ebd \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n tr\u01b0\u1edbc.<\/p>\n\n\n\n<p>Khi c\u00f3 nhi\u1ec1u ph\u00e9p t\u00ednh c\u00f3 c\u00f9ng th\u1ee9 t\u1ef1 \u01b0u ti\u00ean (v\u00ed d\u1ee5 ph\u00e9p c\u1ed9ng v\u00e0 ph\u00e9p tr\u1eeb), th\u00ec ph\u00e9p t\u00ednh \u0111\u01b0\u1ee3c t\u00ednh t\u1eeb tr\u00e1i qua ph\u1ea3i:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">V\u00ed d\u1ee5<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>var x = 100 + 50 - 3;<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Gia_tri_cua_bieu_thuc_uu_tien_trong_JavaScript\"><\/span>Gi\u00e1 tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c \u01b0u ti\u00ean trong JavaScript<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-table w3-table-all\"><table><tbody><tr><th>Gi\u00e1 tr\u1ecb<\/th><th>Bi\u1ec3u th\u1ee9c<\/th><th>M\u00f4 t\u1ea3<\/th><th>V\u00ed d\u1ee5<\/th><\/tr><tr><td>19<\/td><td>( )<\/td><td>Nh\u00f3m l\u1ea1i bi\u1ec3u th\u1ee9c<\/td><td>(3 + 4)<\/td><\/tr><tr><td>&nbsp;<\/td><td>&nbsp;<\/td><td>&nbsp;<\/td><td>&nbsp;<\/td><\/tr><tr><td>18<\/td><td>.<\/td><td>Th\u00e0nh vi\u00ean<\/td><td>person.name<\/td><\/tr><tr><td>18<\/td><td>[]<\/td><td>Th\u00e0nh vi\u00ean<\/td><td>person[&#8220;name&#8221;]<\/td><\/tr><tr><td>&nbsp;<\/td><td>&nbsp;<\/td><td>&nbsp;<\/td><td>&nbsp;<\/td><\/tr><tr><td>17<\/td><td>()<\/td><td>G\u1ecdi h\u00e0m<\/td><td>myFunction()<\/td><\/tr><tr><td>17<\/td><td>new<\/td><td>T\u1ea1o<\/td><td>new Date()<\/td><\/tr><tr><td>&nbsp;<\/td><td>&nbsp;<\/td><td>&nbsp;<\/td><td>&nbsp;<\/td><\/tr><tr><td>16<\/td><td>++<\/td><td>T\u0103ng sau m\u1ed9t \u0111\u01a1n v\u1ecb<\/td><td>i++<\/td><\/tr><tr><td>16<\/td><td>&#8212;<\/td><td>Gi\u1ea3m sau m\u1ed9t \u0111\u01a1n v\u1ecb<\/td><td>i&#8211;<\/td><\/tr><tr><td>&nbsp;<\/td><td>&nbsp;<\/td><td>&nbsp;<\/td><td>&nbsp;<\/td><\/tr><tr><td>15<\/td><td>++<\/td><td>T\u0103ng tr\u01b0\u1edbc m\u1ed9t \u0111\u01a1n v\u1ecb<\/td><td>++i<\/td><\/tr><tr><td>15<\/td><td>&#8212;<\/td><td>Gi\u1ea3m tr\u01b0\u1edbc m\u1ed9t \u0111\u01a1n v\u1ecb<\/td><td>&#8211;i<\/td><\/tr><tr><td>15<\/td><td>!<\/td><td>Ph\u1ee7 \u0111\u1ecbnh<\/td><td>!(x==y)<\/td><\/tr><tr><td>15<\/td><td>typeof<\/td><td>Ki\u1ec3u<\/td><td>typeof x<\/td><\/tr><tr><td>&nbsp;<\/td><td>&nbsp;<\/td><td>&nbsp;<\/td><td>&nbsp;<\/td><\/tr><tr><td>14<\/td><td>*<\/td><td>Nh\u00e2n<\/td><td>10 * 5<\/td><\/tr><tr><td>14<\/td><td>\/<\/td><td>Chia<\/td><td>10 \/ 5<\/td><\/tr><tr><td>14<\/td><td>%<\/td><td>M\u00f4 \u0111un (l\u1ea5y ph\u1ea7n d\u01b0)<\/td><td>10 % 5<\/td><\/tr><tr><td>14 (th\u1eed nghi\u1ec7m)<\/td><td>**<\/td><td>Lu\u1ef9 th\u1eeba<\/td><td>10 ** 2<\/td><\/tr><tr><td>&nbsp;<\/td><td>&nbsp;<\/td><td>&nbsp;<\/td><td>&nbsp;<\/td><\/tr><tr><td>13<\/td><td>+<\/td><td>C\u1ed9ng<\/td><td>10 + 5<\/td><\/tr><tr><td>13<\/td><td>&#8211;<\/td><td>Tr\u1eeb<\/td><td>10 &#8211; 5<\/td><\/tr><tr><td>&nbsp;<\/td><td>&nbsp;<\/td><td>&nbsp;<\/td><td>&nbsp;<\/td><\/tr><tr><td>12<\/td><td>&lt;&lt;<\/td><td>Shift tr\u00e1i<\/td><td>x &lt;&lt; 2<\/td><\/tr><tr><td>12<\/td><td>&gt;&gt;<\/td><td>Shift ph\u1ea3i<\/td><td>x &gt;&gt; 2<\/td><\/tr><tr><td>&nbsp;<\/td><td>&nbsp;<\/td><td>&nbsp;<\/td><td>&nbsp;<\/td><\/tr><tr><td>11<\/td><td>&lt;<\/td><td>Nh\u1ecf h\u01a1n<\/td><td>x &lt; y<\/td><\/tr><tr><td>11<\/td><td>&lt;=<\/td><td>Nh\u1ecf h\u01a1n ho\u1eb7c b\u1eb1ng<\/td><td>x &lt;= y<\/td><\/tr><tr><td>11<\/td><td>&gt;<\/td><td>L\u1edbn h\u01a1n<\/td><td>x &gt; y<\/td><\/tr><tr><td>11<\/td><td>&gt;=<\/td><td>L\u1edbn h\u01a1n ho\u1eb7c b\u1eb1ng<\/td><td>x &gt;= y<\/td><\/tr><tr><td>&nbsp;<\/td><td>&nbsp;<\/td><td>&nbsp;<\/td><td>&nbsp;<\/td><\/tr><tr><td>10<\/td><td>==<\/td><td>B\u1eb1ng<\/td><td>x == y<\/td><\/tr><tr><td>10<\/td><td>===<\/td><td>B\u1eb1ng ch\u1eb7t<\/td><td>x === y<\/td><\/tr><tr><td>10<\/td><td>!=<\/td><td>Kh\u00f4ng b\u1eb1ng<\/td><td>x != y<\/td><\/tr><tr><td>10<\/td><td>!==<\/td><td>Kh\u00f4ng b\u1eb1ng ch\u1eb7t<\/td><td>x !== y<\/td><\/tr><tr><td>&nbsp;<\/td><td>&nbsp;<\/td><td>&nbsp;<\/td><td>&nbsp;<\/td><\/tr><tr><td>6<\/td><td>&amp;&amp;<\/td><td>V\u00e0<\/td><td>x &amp;&amp; y<\/td><\/tr><tr><td>5<\/td><td>||<\/td><td>Ho\u1eb7c<\/td><td>x || y<\/td><\/tr><tr><td>&nbsp;<\/td><td>&nbsp;<\/td><td>&nbsp;<\/td><td>&nbsp;<\/td><\/tr><tr><td>3<\/td><td>=<\/td><td>G\u00e1n<\/td><td>x = y<\/td><\/tr><tr><td>3<\/td><td>+=<\/td><td>G\u00e1n<\/td><td>x += y<\/td><\/tr><tr><td>3<\/td><td>-=<\/td><td>G\u00e1n<\/td><td>x -= y<\/td><\/tr><tr><td>3<\/td><td>*=<\/td><td>G\u00e1n<\/td><td>x *= y<\/td><\/tr><tr><td>3<\/td><td>\/=<\/td><td>G\u00e1n<\/td><td>x \/= y<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Ph\u00e9p t\u00ednh trong bi\u1ec3u th\u1ee9c c\u00f3 ngo\u1eb7c s\u1ebd \u0111\u01b0\u1ee3c \u01b0u ti\u00ean t\u00ednh to\u00e1n \u0111\u1ea7y \u0111\u1ee7 tr\u01b0\u1edbc khi gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong ph\u1ea7n c\u00f2n l\u1ea1i.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>M\u1ed9t ph\u1ea7n bao gi\u1edd c\u0169ng quan tr\u1ecdng trong b\u1ea5t c\u1ee9 ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh n\u00e0o, \u0111\u00f3 l\u00e0 thao t\u00e1c tr\u00ean c\u00e1c con s\u1ed1. H\u00f4m nay ch\u00fang ta s\u1ebd xem \u0111i\u1ec1u \u1ea5y trong JavaScript. C\u00e1c to\u00e1n t\u1eed s\u1ed1 h\u1ecdc trong JavaScript N\u00f3 c\u00f3 th\u1ec3 l\u00e0m vi\u1ec7c tr\u00ean c\u00e1c con s\u1ed1 th\u1ef1c s\u1ef1, ho\u1eb7c c\u00e1c bi\u1ebfn ch\u1ee9a &hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[236],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>C\u00e1c ph\u00e9p to\u00e1n trong JavaScript &#8226; Ki\u1ebfn c\u00e0ng<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/kiencang.net\/cac-phep-toan-trong-javascript\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"C\u00e1c ph\u00e9p to\u00e1n trong JavaScript &#8226; Ki\u1ebfn c\u00e0ng\" \/>\n<meta property=\"og:description\" content=\"M\u1ed9t ph\u1ea7n bao gi\u1edd c\u0169ng quan tr\u1ecdng trong b\u1ea5t c\u1ee9 ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh n\u00e0o, \u0111\u00f3 l\u00e0 thao t\u00e1c tr\u00ean c\u00e1c con s\u1ed1. 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