2018-10-10 22:03:03 +00:00
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---
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id: 56533eb9ac21ba0edf2244a9
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2020-12-16 07:37:30 +00:00
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title: 使用赋值运算符初始化变量
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2018-10-10 22:03:03 +00:00
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challengeType: 1
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2020-04-29 10:29:13 +00:00
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videoUrl: 'https://scrimba.com/c/cWJ4Bfb'
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forumTopicId: 301171
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2018-10-10 22:03:03 +00:00
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---
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2020-12-16 07:37:30 +00:00
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# --description--
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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通常在声明变量的时候会给变量<dfn>初始化</dfn>一个初始值。
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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`var myVar = 0;`
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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创建一个名为`myVar`的变量并指定一个初始值`0`。
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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# --instructions--
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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通过关键字`var`定义一个变量`a`并且给它一个初始值`9`。
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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# --hints--
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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你需要初始化`a`的值为`9`。
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2018-10-10 22:03:03 +00:00
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```js
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2020-12-16 07:37:30 +00:00
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assert(/var\s+a\s*=\s*9\s*/.test(code));
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2018-10-10 22:03:03 +00:00
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```
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2020-12-16 07:37:30 +00:00
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# --solutions--
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2020-04-29 10:29:13 +00:00
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