14 lines
240 B
Markdown
14 lines
240 B
Markdown
### isNumber
|
|
|
|
Checks if the given argument is a number.
|
|
|
|
Use `typeof` to check if a value is classified as a number primitive.
|
|
|
|
```js
|
|
const isNumber = val => typeof val === 'number';
|
|
```
|
|
|
|
```js
|
|
isNumber('1') -> false
|
|
isNumber(1) -> true
|
|
``` |