Java is the most popular programming language available with a wide range of features, In java language sqrt() function is very useful for the mathematical operation in the program.

## What is sqrt() function

**sqrt()**function in Java programming language is used to find the square root of any given number.**sqrt()**function is predefined in the library.**sqrt()**function is available in “math” class package.

## How to use sqrt() function

- Firstly, we need to declare the math class before the main function.
- Now use the function followed by the syntax – sqrt(variable/number).
- Finally, give the input to the function.

## Example of sqrt() function

class test { public static void main(string args[]) { int x; x=Math.sqrt(9); system.out.println("The square root of 9 is:"+x); } }

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