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# Function sqrt

Calculate the square root of a value.

For matrices, the function is evaluated element wise.


## Syntax

```js
math.sqrt(x)
```

### Parameters

Parameter | Type | Description
--------- | ---- | -----------
`x` | number &#124; BigNumber &#124; Complex &#124; Array &#124; Matrix &#124; Unit |  Value for which to calculate the square root.

### Returns

Type | Description
---- | -----------
number &#124; BigNumber &#124; Complex &#124; Array &#124; Matrix &#124; Unit |  Returns the square root of `x`


## Examples

```js
math.sqrt(25);                // returns 5
math.square(5);               // returns 25
math.sqrt(-4);                // returns Complex 2i
```


## See also

[square](square.md),
[multiply](multiply.md),
[cube](cube.md),
[cbrt](cbrt.md)
