## Purpose

## Return value

## Syntax

`=SQRT(number)`

*number*- The number to get the square root of.

## How to use

The Excel SQRT function returns the square root of a positive number. SQRT returns an error if *number* is negative.

The SQRT function takes one argument, *number*, which must be a numeric value. If *number* is not numeric, SQRT returns a #VALUE! error. If *number* is negative, SQRT returns a #NUM! error.

### Examples

```
=SQRT(9) // returns 3
=SQRT(81) // returns 9
=SQRT(144) // returns 12
=SQRT(0.25) // returns 0.5
=SQRT(0) // returns 0
```

### Negative numbers

The SQRT function will return a #NUM! error when *number* is negative:

```
=SQRT(-9) // returns #NUM!
```

To get the square root of a negative number (as if the number was positive), wrap the number in the ABS function like this:

```
=SQRT(ABS(-9)) // returns 3
```

### Notes

- If
*number*is not numeric, SQRT returns a #VALUE! error. - If
*number*is negative, SQRT returns a #NUM! error.