409c39abf1
* feat(curriculum): Add Basic JS Scrimba links * Fix: Add missing video url. * fix: update videoUrl
68 lines
2.0 KiB
Markdown
68 lines
2.0 KiB
Markdown
---
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id: 587d7b7e367417b2b2512b23
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title: Use the parseInt Function
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challengeType: 1
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videoUrl: 'https://scrimba.com/c/cm83LSW'
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---
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## Description
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<section id='description'>
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The <code>parseInt()</code> function parses a string and returns an integer. Here's an example:
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<code>var a = parseInt("007");</code>
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The above function converts the string "007" to an integer 7. If the first character in the string can't be converted into a number, then it returns <code>NaN</code>.
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</section>
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## Instructions
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<section id='instructions'>
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Use <code>parseInt()</code> in the <code>convertToInteger</code> function so it converts the input string <code>str</code> into an integer, and returns it.
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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>convertToInteger</code> should use the <code>parseInt()</code> function
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testString: assert(/parseInt/g.test(code), '<code>convertToInteger</code> should use the <code>parseInt()</code> function');
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- text: <code>convertToInteger("56")</code> should return a number
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testString: assert(typeof(convertToInteger("56")) === "number", '<code>convertToInteger("56")</code> should return a number');
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- text: <code>convertToInteger("56")</code> should return 56
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testString: assert(convertToInteger("56") === 56, '<code>convertToInteger("56")</code> should return 56');
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- text: <code>convertToInteger("77")</code> should return 77
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testString: assert(convertToInteger("77") === 77, '<code>convertToInteger("77")</code> should return 77');
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- text: <code>convertToInteger("JamesBond")</code> should return NaN
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testString: assert.isNaN(convertToInteger("JamesBond"), '<code>convertToInteger("JamesBond")</code> should return NaN');
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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 convertToInteger(str) {
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}
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convertToInteger("56");
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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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function convertToInteger(str) {
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return parseInt(str);
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}
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```
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</section>
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