60 lines
2.3 KiB
Markdown
60 lines
2.3 KiB
Markdown
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---
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id: 587d7b7e367417b2b2512b21
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title: Use Multiple Conditional (Ternary) Operators
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challengeType: 1
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videoUrl: ''
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localeTitle: 使用多个条件（三元）运算符
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---
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## Description
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<section id="description">在之前的挑战中，您使用了单个<code>conditional operator</code> 。您也可以将它们链接在一起以检查多种条件。以下函数使用if，else if和else语句来检查多个条件： <blockquote> function findGreaterOrEqual（a，b）{ <br> if（a === b）{ <br>返回“a和b相等”; <br> } <br>否则如果（a> b）{ <br>返回“a更大”; <br> } <br>其他{ <br>返回“b更大”; <br> } <br> } </blockquote>可以使用多个<code>conditional operators</code>重写上述函数： <blockquote> function findGreaterOrEqual（a，b）{ <br>返回（a === b）？ “a和b相等”：（a> b）？ “a更大”：“b更大”; <br> } </blockquote></section>
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## Instructions
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<section id="instructions">在<code>checkSign</code>函数中使用多个<code>conditional operators</code>来检查数字是正数，负数还是零。 </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>checkSign</code>应该使用多个<code>conditional operators</code>
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testString: 'assert(/.+?\s*?\?\s*?.+?\s*?:\s*?.+?\s*?\?\s*?.+?\s*?:\s*?.+?/gi.test(code), "<code>checkSign</code> should use multiple <code>conditional operators</code>");'
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- text: <code>checkSign(10)</code>应该返回“positive”。请注意，资本化很重要
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testString: 'assert(checkSign(10) === "positive", "<code>checkSign(10)</code> should return "positive". Note that capitalization matters");'
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- text: <code>checkSign(-12)</code>应返回“否定”。请注意，资本化很重要
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testString: 'assert(checkSign(-12) === "negative", "<code>checkSign(-12)</code> should return "negative". Note that capitalization matters");'
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- text: <code>checkSign(0)</code>应返回“零”。请注意，资本化很重要
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testString: 'assert(checkSign(0) === "zero", "<code>checkSign(0)</code> should return "zero". Note that capitalization matters");'
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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 checkSign(num) {
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}
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checkSign(10);
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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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