62 lines
1.4 KiB
Markdown
62 lines
1.4 KiB
Markdown
---
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id: cf1391c1c11feddfaeb4bdef
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title: Create Decimal Numbers with JavaScript
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challengeType: 1
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videoUrl: ''
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localeTitle: 使用JavaScript创建十进制数
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---
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## Description
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<section id="description">我们也可以在变量中存储十进制数。十进制数有时称为<dfn>浮点数</dfn>或<dfn>浮点数</dfn> 。 <strong>注意</strong> <br>并非所有实数都可以准确地以<dfn>浮点</dfn>表示。这可能导致舍入错误。 <a href="https://en.wikipedia.org/wiki/Floating_point#Accuracy_problems" target="_blank">细节在这里</a> 。 </section>
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## Instructions
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<section id="instructions">创建一个变量<code>myDecimal</code>并给它一个带小数部分的十进制值（例如<code>5.7</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>myDecimal</code>应该是一个数字。
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testString: 'assert(typeof myDecimal === "number", "<code>myDecimal</code> should be a number.");'
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- text: <code>myDecimal</code>应该有一个小数点
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testString: 'assert(myDecimal % 1 != 0, "<code>myDecimal</code> should have a decimal point"); '
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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 ourDecimal = 5.7;
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// Only change code below this line
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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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