74 lines
1.1 KiB
Markdown
74 lines
1.1 KiB
Markdown
---
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id: cf1111c1c11feddfaeb3bdef
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challengeType: 1
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videoUrl: 'https://scrimba.com/c/cM2KBAG'
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forumTopicId: 16650
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title: 加法运算
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---
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## Description
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<section id='description'>
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<code>Number</code>是 JavaScript 中的一种数据类型，表示数值。
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现在让我们来尝试在 JavaScript 中做加法运算。
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JavaScript 中使用<code>+</code>号进行加法运算。
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<strong>示例</strong>
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```js
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myVar = 5 + 10; // assigned 15
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```
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</section>
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## Instructions
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<section id='instructions'>
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改变数字<code>0</code>让变量 sum 的值为<code>20</code>。
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</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: <code>sum</code>应该等于<code>20</code>。
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testString: assert(sum === 20);
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- text: 要使用<code>+</code>运算符。
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testString: assert(/\+/.test(code));
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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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var sum = 10 + 0;
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```
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</div>
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### After Test
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<div id='js-teardown'>
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```js
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(function(z){return 'sum = '+z;})(sum);
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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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var sum = 10 + 10;
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```
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</section>
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