JavaScript Math sqrt() method

Last Updated : 17 Mar 2025

The JavaScript math sqrt() method returns the square root of a number. If the provided number is negative, it returns NaN.

Syntax

The sqrt() method is represented by the following syntax:

Parameter

num - A number.

Return

The square root of the given number.

JavaScript Math sqrt() method example

Here, we will understand sqrt() method through various examples.

Example 1

Let's see an example to print square root of the given numbers.

Output:

Example 2

Let's see some cases where sqrt() method returns NaN.

Output:

Example 3

Here, you can test sqrt() method with your own test cases.