# Get the Square of a Double Value in Java

Mohammad Irfan Jan 30, 2023 Nov 24, 2021

This tutorial introduces the ways to get the square of a double value in Java.

The square of a number is a product of the number (itself). For example, a square of 2 is 4 (`2*2`). In Java, we can use several ways to get the square of any number, such as a built-in method of the `Math` package or custom code.

This article will teach us to get the square of a double value in Java by using either a built-in method or our custom code. Let’s start with some examples.

## Get Square by Multiplying in Java

In this example, we used the multiply operator to get the square of a double value. This is one of the easiest and fast ways to get the square of any number. See the example below.

``````public class SimpleTesting{
public static void main(String[] args){

double dval = 25.0;
System.out.println("double value = "+dval);
double result = dval*dval;
System.out.println("square result "+result);
}
}
``````

Output:

``````double value = 25.0
square result 625.0
``````

## Get Square by `Math.pow()` Method in Java

Java provides a built-in math method, `pow()`, to get the square of any value. This method takes two arguments, one is the value, and the second is the power. We pass the second argument as 2 because we want a square as a result. See the example below.

``````public class SimpleTesting{
public static void main(String[] args){

double dval = 25.0;
System.out.println("double value = "+dval);
double result = Math.pow(dval,2);
System.out.println("square result "+result);
}
}
``````

Output:

``````double value = 25.0
square result 625.0
``````