freeCodeCamp/curriculum/challenges/arabic/02-javascript-algorithms-an.../basic-javascript/subtract-one-number-from-an...

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---
id: cf1111c1c11feddfaeb4bdef
title: Subtract One Number from Another with JavaScript
challengeType: 1
videoUrl: ''
localeTitle: ''
---
## Description
undefined
## Instructions
undefined
## Tests
<section id='tests'>
```yml
tests:
- text: ''
testString: 'assert(difference === 12, "Make the variable <code>difference</code> equal 12.");'
- text: ''
testString: 'assert(/var\s*difference\s*=\s*45\s*-\s*[0-9]*;(?!\s*[a-zA-Z0-9]+)/.test(code),"Only subtract one number from 45.");'
```
</section>
## Challenge Seed
<section id='challengeSeed'>
<div id='js-seed'>
```js
var difference = 45 - 0;
```
</div>
### After Test
<div id='js-teardown'>
```js
console.info('after the test');
```
</div>
</section>
## Solution
<section id='solution'>
```js
// solution required
```
</section>