87 lines
1.9 KiB
Markdown
87 lines
1.9 KiB
Markdown
---
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id: 56533eb9ac21ba0edf2244b9
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challengeType: 1
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videoUrl: 'https://scrimba.com/c/cqk8rf4'
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forumTopicId: 16805
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title: 用变量构造字符串
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---
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## Description
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<section id='description'>
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有时候你需要创建一个类似<a href="https://en.wikipedia.org/wiki/Mad_Libs" target="_blank">Mad Libs</a>(填词游戏）风格的字符串。通过使用连接运算符<code> + </code>，你可以插入一个或多个变量来组成一个字符串。
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</section>
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## Instructions
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<section id='instructions'>
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把你的名字赋值给变量<code>myName</code>，然后把变量<code>myName</code>插入到字符串<code>"My name is "</code>和<code>" and I am well!"</code>之间，并把连接后的结果赋值给变量<code>myStr</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>myName</code>至少要包含三个字符。
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testString: assert(typeof myName !== 'undefined' && myName.length > 2);
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- text: 使用两个<code>+</code>操作符创建包含<code>myName</code>的<code>myStr</code>变量。
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testString: assert(code.match(/["']\s*\+\s*myName\s*\+\s*["']/g).length > 0);
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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 ourName = "freeCodeCamp";
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var ourStr = "Hello, our name is " + ourName + ", how are you?";
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// Only change code below this line
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var myName;
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var myStr;
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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(){
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var output = [];
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if(typeof myName === 'string') {
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output.push('myName = "' + myName + '"');
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} else {
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output.push('myName is not a string');
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}
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if(typeof myStr === 'string') {
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output.push('myStr = "' + myStr + '"');
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} else {
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output.push('myStr is not a string');
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}
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return output.join('\n');
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})();
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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 myName = "Bob";
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var myStr = "My name is " + myName + " and I am well!";
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```
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</section>
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