79 lines
2.4 KiB
Markdown
79 lines
2.4 KiB
Markdown
---
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id: 56533eb9ac21ba0edf2244da
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title: Introducing Else Statements
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challengeType: 1
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videoUrl: ''
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localeTitle: 介绍其他声明
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---
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## Description
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<section id="description">当<code>if</code>语句的条件为真时，将执行其后面的代码块。当那个条件是假的时候怎么办？通常什么都不会发生。使用<code>else</code>语句，可以执行备用代码块。 <blockquote> if（num> 10）{ <br>返回“大于10”; <br> } else { <br>返回“10或更少”; <br> } </blockquote></section>
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## Instructions
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<section id="instructions">将<code>if</code>语句组合到单个<code>if/else</code>语句中。 </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: 您应该只在编辑器中有一个<code>if</code>语句
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testString: 'assert(code.match(/if/g).length === 1, "You should only have one <code>if</code> statement in the editor");'
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- text: 你应该使用<code>else</code>语句
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testString: 'assert(/else/g.test(code), "You should use an <code>else</code> statement");'
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- text: <code>testElse(4)</code>应返回“5或更小”
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testString: 'assert(testElse(4) === "5 or Smaller", "<code>testElse(4)</code> should return "5 or Smaller"");'
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- text: <code>testElse(5)</code>应返回“5或更小”
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testString: 'assert(testElse(5) === "5 or Smaller", "<code>testElse(5)</code> should return "5 or Smaller"");'
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- text: <code>testElse(6)</code>应该返回“大于5”
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testString: 'assert(testElse(6) === "Bigger than 5", "<code>testElse(6)</code> should return "Bigger than 5"");'
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- text: <code>testElse(10)</code>应该返回“大于5”
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testString: 'assert(testElse(10) === "Bigger than 5", "<code>testElse(10)</code> should return "Bigger than 5"");'
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- text: 请勿更改行上方或下方的代码。
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testString: 'assert(/var result = "";/.test(code) && /return result;/.test(code), "Do not change the code above or below the lines.");'
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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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function testElse(val) {
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var result = "";
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// Only change code below this line
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if (val > 5) {
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result = "Bigger than 5";
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}
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if (val <= 5) {
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result = "5 or Smaller";
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}
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// Only change code above this line
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return result;
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}
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// Change this value to test
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testElse(4);
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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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