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freeCodeCamp/curriculum/challenges/portuguese/02-javascript-algorithms-and-data-structures/basic-javascript/understanding-boolean-values.md

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---
id: bd7123c9c441eddfaeb5bdef
title: Understanding Boolean Values
challengeType: 1
videoUrl: 'https://scrimba.com/c/c9Me8t4'
forumTopicId: 301176
dashedName: understanding-boolean-values
---
# --description--
Another data type is the <dfn>Boolean</dfn>. Booleans may only be one of two values: `true` or `false`. They are basically little on-off switches, where `true` is on and `false` is off. These two states are mutually exclusive.
**Note:** Boolean values are never written with quotes. The strings `"true"` and `"false"` are not Boolean and have no special meaning in JavaScript.
# --instructions--
Modify the `welcomeToBooleans` function so that it returns `true` instead of `false` when the run button is clicked.
# --hints--
The `welcomeToBooleans()` function should return a Boolean (`true` or `false`) value.
```js
assert(typeof welcomeToBooleans() === 'boolean');
```
`welcomeToBooleans()` should return `true`.
```js
assert(welcomeToBooleans() === true);
```
# --seed--
## --after-user-code--
```js
welcomeToBooleans();
```
## --seed-contents--
```js
function welcomeToBooleans() {
// Only change code below this line
return false; // Change this line
// Only change code above this line
}
```
# --solutions--
```js
function welcomeToBooleans() {
return true; // Change this line
}
```