409c39abf1
* feat(curriculum): Add Basic JS Scrimba links * Fix: Add missing video url. * fix: update videoUrl
74 lines
1.8 KiB
Markdown
74 lines
1.8 KiB
Markdown
---
|
|
id: bd7123c9c441eddfaeb5bdef
|
|
title: Understanding Boolean Values
|
|
challengeType: 1
|
|
videoUrl: 'https://scrimba.com/c/c9Me8t4'
|
|
---
|
|
|
|
## Description
|
|
<section id='description'>
|
|
Another data type is the <dfn>Boolean</dfn>. <code>Booleans</code> may only be one of two values: <code>true</code> or <code>false</code>. They are basically little on-off switches, where <code>true</code> is "on" and <code>false</code> is "off." These two states are mutually exclusive.
|
|
<strong>Note</strong><br><code>Boolean</code> values are never written with quotes. The <code>strings</code> <code>"true"</code> and <code>"false"</code> are not <code>Boolean</code> and have no special meaning in JavaScript.
|
|
</section>
|
|
|
|
## Instructions
|
|
<section id='instructions'>
|
|
Modify the <code>welcomeToBooleans</code> function so that it returns <code>true</code> instead of <code>false</code> when the run button is clicked.
|
|
</section>
|
|
|
|
## Tests
|
|
<section id='tests'>
|
|
|
|
```yml
|
|
tests:
|
|
- text: The <code>welcomeToBooleans()</code> function should return a boolean (true/false) value.
|
|
testString: assert(typeof welcomeToBooleans() === 'boolean', 'The <code>welcomeToBooleans()</code> function should return a boolean (true/false) value.');
|
|
- text: <code>welcomeToBooleans()</code> should return true.
|
|
testString: assert(welcomeToBooleans() === true, '<code>welcomeToBooleans()</code> should return true.');
|
|
|
|
```
|
|
|
|
</section>
|
|
|
|
## Challenge Seed
|
|
<section id='challengeSeed'>
|
|
|
|
<div id='js-seed'>
|
|
|
|
```js
|
|
function welcomeToBooleans() {
|
|
|
|
// Only change code below this line.
|
|
|
|
return false; // Change this line
|
|
|
|
// Only change code above this line.
|
|
}
|
|
```
|
|
|
|
</div>
|
|
|
|
|
|
### After Test
|
|
<div id='js-teardown'>
|
|
|
|
```js
|
|
welcomeToBooleans();
|
|
```
|
|
|
|
</div>
|
|
|
|
</section>
|
|
|
|
## Solution
|
|
<section id='solution'>
|
|
|
|
|
|
```js
|
|
function welcomeToBooleans() {
|
|
return true; // Change this line
|
|
}
|
|
```
|
|
|
|
</section>
|