e9212c61d2
* fix: rm assert msg basic-javascript * fix: removed more assert msg args * fix: fixed verbiage Co-Authored-By: Parth Parth <34807532+thecodingaviator@users.noreply.github.com>
77 lines
1.9 KiB
Markdown
77 lines
1.9 KiB
Markdown
---
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id: cf1111c1c11feddfaeb9bdef
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title: Generate Random Fractions with JavaScript
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challengeType: 1
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videoUrl: 'https://scrimba.com/c/cyWJJs3'
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---
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## Description
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<section id='description'>
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Random numbers are useful for creating random behavior.
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JavaScript has a <code>Math.random()</code> function that generates a random decimal number between <code>0</code> (inclusive) and not quite up to <code>1</code> (exclusive). Thus <code>Math.random()</code> can return a <code>0</code> but never quite return a <code>1</code>
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<strong>Note</strong><br>Like <a href='learn/javascript-algorithms-and-data-structures/basic-javascript/storing-values-with-the-assignment-operator' target='_blank'>Storing Values with the Equal Operator</a>, all function calls will be resolved before the <code>return</code> executes, so we can <code>return</code> the value of the <code>Math.random()</code> function.
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</section>
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## Instructions
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<section id='instructions'>
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Change <code>randomFraction</code> to return a random number instead of returning <code>0</code>.
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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>randomFraction</code> should return a random number.
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testString: assert(typeof randomFraction() === "number");
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- text: The number returned by <code>randomFraction</code> should be a decimal.
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testString: assert((randomFraction()+''). match(/\./g));
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- text: You should be using <code>Math.random</code> to generate the random decimal number.
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testString: assert(code.match(/Math\.random/g).length >= 0);
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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 randomFraction() {
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// Only change code below this line.
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return 0;
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// Only change code above this line.
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}
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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(){return randomFraction();})();
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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 randomFraction() {
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return Math.random();
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}
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```
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</section>
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