66 lines
1.7 KiB
Markdown
66 lines
1.7 KiB
Markdown
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---
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id: 56533eb9ac21ba0edf2244c0
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title: Global vs. Local Scope in Functions
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challengeType: 1
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videoUrl: ''
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localeTitle: 功能中的全局与局部范围
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---
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## Description
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<section id="description">可以使<dfn>本地</dfn>变量和<dfn>全局</dfn>变量具有相同的名称。执行此操作时， <code>local</code>变量优先于<code>global</code>变量。在这个例子中： <blockquote> var someVar =“帽子”; <br> function myFun（）{ <br> var someVar =“Head”; <br>返回someVar; <br> } </blockquote>函数<code>myFun</code>将返回<code>"Head"</code>因为存在变量的<code>local</code>版本。 </section>
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## Instructions
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<section id="instructions">将一个局部变量添加到<code>myOutfit</code>函数，以使用<code>"sweater"</code>覆盖<code>outerWear</code>的值。 </section>
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## Tests
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<section id='tests'>
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```yml
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tests:
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- text: 不要更改全局<code>outerWear</code>的值
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testString: 'assert(outerWear === "T-Shirt", "Do not change the value of the global <code>outerWear</code>");'
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- text: <code>myOutfit</code>应该返回<code>"sweater"</code>
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testString: 'assert(myOutfit() === "sweater", "<code>myOutfit</code> should return <code>"sweater"</code>");'
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- text: 不要更改return语句
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testString: 'assert(/return outerWear/.test(code), "Do not change the return statement");'
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```
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</section>
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## Challenge Seed
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<section id='challengeSeed'>
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<div id='js-seed'>
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```js
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// Setup
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var outerWear = "T-Shirt";
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function myOutfit() {
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// Only change code below this line
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// Only change code above this line
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return outerWear;
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}
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myOutfit();
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```
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</div>
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</section>
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## Solution
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<section id='solution'>
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```js
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// solution required
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```
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</section>
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