69 lines
1.6 KiB
Markdown
69 lines
1.6 KiB
Markdown
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---
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id: 56533eb9ac21ba0edf2244ed
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title: Appending Variables to Strings
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challengeType: 1
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guideUrl: 'https://chinese.freecodecamp.org/guide/certificates/appending-variables-to-strings'
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videoUrl: ''
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localeTitle: 将变量附加到字符串
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---
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## Description
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<section id="description">正如我们可以在字符串<dfn>文字中</dfn>构建多行的字符串一样，我们也可以使用加号等于（ <code>+=</code> ）运算符将变量附加到字符串。 </section>
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## Instructions
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<section id="instructions">设置<code>someAdjective</code>并使用<code>+=</code>运算符将其附加到<code>myStr</code> 。 </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>someAdjective</code>应设置为至少3个字符长的字符串
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testString: 'assert(typeof someAdjective !== "undefined" && someAdjective.length > 2, "<code>someAdjective</code> should be set to a string at least 3 characters long");'
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- text: 使用<code>+=</code>运算符将<code>someAdjective</code>附加到<code>myStr</code>
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testString: 'assert(code.match(/myStr\s*\+=\s*someAdjective\s*/).length > 0, "Append <code>someAdjective</code> to <code>myStr</code> using the <code>+=</code> operator");'
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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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// Example
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var anAdjective = "awesome!";
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var ourStr = "freeCodeCamp is ";
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ourStr += anAdjective;
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// Only change code below this line
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var someAdjective;
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var myStr = "Learning to code is ";
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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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console.info('after the test');
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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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