Start of main content## More like this

Checks if the given value is equal to negative zero (`-0`

).

- Check whether a passed value is equal to
`0`

and if`1`

divided by the value equals`-Infinity`

.

`const isNegativeZero = val => val === 0 && 1 / val === -Infinity;`

```
isNegativeZero(-0); // true
isNegativeZero(0); // false
```

### Percentile of matches

JavaScript, Math

Calculates the percentage of numbers in the given array that are less or equal to the given value.

### Validate number

JavaScript, Math

Checks if the given value is a number.

### Number in range

JavaScript, Math

Checks if the given number falls within the given range.