freeCodeCamp/curriculum/challenges/chinese/02-javascript-algorithms-and-data-structures/basic-javascript/initializing-variables-with-the-assignment-operator.md

id, challengeType, videoUrl, forumTopicId, localeTitle

id	challengeType	videoUrl	forumTopicId	localeTitle
56533eb9ac21ba0edf2244a9	1	https://scrimba.com/c/cWJ4Bfb	301171	使用赋值运算符初始化变量

Description

通常在声明变量的时候会给变量初始化一个初始值。 var myVar = 0; 创建一个名为myVar的变量并指定一个初始值0。

Instructions

通过关键字var定义一个变量a并且给它一个初始值9。

Tests

tests:
  - text: 你需要初始化<code>a</code>的值为<code>9</code>。
    testString: assert(/var\s+a\s*=\s*9\s*/.test(code));

Challenge Seed

// Example
var ourVar = 19;

// Only change code below this line

After Test

if(typeof a !== 'undefined') {(function(a){return "a = " + a;})(a);} else { (function() {return 'a is undefined';})(); }

Solution

var a = 9;