89 lines
1.6 KiB
Markdown
89 lines
1.6 KiB
Markdown
---
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id: 56533eb9ac21ba0edf2244b1
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title: Compound Assignment With Augmented Multiplication
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challengeType: 1
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videoUrl: 'https://scrimba.com/c/c83vrfa'
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---
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## Description
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<section id='description'>
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The <code>*=</code> operator multiplies a variable by a number.
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<code>myVar = myVar * 5;</code>
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will multiply <code>myVar</code> by <code>5</code>. This can be rewritten as:
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<code>myVar *= 5;</code>
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</section>
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## Instructions
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<section id='instructions'>
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Convert the assignments for <code>a</code>, <code>b</code>, and <code>c</code> to use the <code>*=</code> operator.
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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>a</code> should equal <code>25</code>
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testString: assert(a === 25);
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- text: <code>b</code> should equal <code>36</code>
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testString: assert(b === 36);
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- text: <code>c</code> should equal <code>46</code>
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testString: assert(c === 46);
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- text: You should use the <code>*=</code> operator for each variable
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testString: assert(code.match(/\*=/g).length === 3);
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- text: Do not modify the code above the line
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testString: assert(/var a = 5;/.test(code) && /var b = 12;/.test(code) && /var c = 4\.6;/.test(code));
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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 a = 5;
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var b = 12;
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var c = 4.6;
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// Only modify code below this line
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a = a * 5;
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b = 3 * b;
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c = c * 10;
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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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(function(a,b,c){ return "a = " + a + ", b = " + b + ", c = " + c; })(a,b,c);
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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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var a = 5;
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var b = 12;
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var c = 4.6;
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a *= 5;
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b *= 3;
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c *= 10;
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```
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</section>
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