# Get square root of a number using Math.sqrt in Java

In order to get the square root of a number in Java, we use the java.lang.Math.pow() method. The Math.pow(double a) method accepts one argument of the double data type and returns a value which is the square root of the argument.

Declaration − The java.lang.Math.sqrt() method is declared as follows −

public static double sqrt(double a)

where a is the number whose square root is to be found.

Let us see a program where we find the square root of number using the Math.sqrt() method.

## Example

Live Demo

import java.lang.Math;
public class Example {
public static void main(String[] args) {
// declaring and initializing some double values
double x = 25;
double y = 81;
// computing the square roots
System.out.println("The square root of "+ x + " is "+ Math.sqrt(x));
System.out.println("The square root of "+ y + " is "+ Math.sqrt(y));
}
}

## Output

The square root of 25.0 is 5.0
The square root of 81.0 is 9.0