22 lines
471 B
Markdown
22 lines
471 B
Markdown
---
|
|
title: String is alpha
|
|
tags: string,regexp
|
|
expertise: beginner
|
|
firstSeen: 2020-12-31T14:01:42+02:00
|
|
lastUpdated: 2020-12-31T14:01:42+02:00
|
|
---
|
|
|
|
Checks if a string contains only alpha characters.
|
|
|
|
- Use `RegExp.prototype.test()` to check if the given string matches against the alphabetic regexp pattern.
|
|
|
|
```js
|
|
const isAlpha = str => /^[a-zA-Z]*$/.test(str);
|
|
```
|
|
|
|
```js
|
|
isAlpha('sampleInput'); // true
|
|
isAlpha('this Will fail'); // false
|
|
isAlpha('123'); // false
|
|
```
|