# Math.sqrt method

The `Math.sqrt` method returns the square root of a number.

## Syntax

`Math.sqrt(positive number);`

## Example

Let's take the square root of `4`:

`console.log(Math.sqrt(4));`

The code execution result:

`2`

## Example

Let's get the square root of `15`:

`console.log(Math.sqrt(15));`

The code execution result:

`3.872983346207417`

## Example

Let's take the square root of `-100`. Since a negative number is passed, `NaN` will be displayed:

`console.log(Math.sqrt(-100));`

The code execution result:

`NaN`

## See also

- the `Math.pow` method
  that raises a number to a given power

← →
↑
en ru