17 lines
326 B
Markdown
17 lines
326 B
Markdown
---
|
|
title: countVowels
|
|
tags: string,beginner
|
|
---
|
|
|
|
Returns `number` of vowels in provided string.
|
|
|
|
Use a regular expression to count the number of vowels `(A, E, I, O, U)` in a `string`.
|
|
|
|
```js
|
|
const countVowels = str => (str.match(/[aeiou]/gi) || []).length;
|
|
```
|
|
|
|
```js
|
|
countVowels('foobar'); // 3
|
|
countVowels('gym'); // 0
|
|
``` |