# Calculate Area / Circumference Of Circle Using Java Math.PI

In this example, we are going to explain the **usage of Java Math.PI to calculate area / circumference of circle**

On below example, we are using Math.PI for finding the area / circumference of circle.

Formula to find the Area/Circumference are below Area = radius*radius*PI Circumference = PI*radius*2

## Calculate Area / Circumference Of Circle Using Java Math.PI

package com.examples;

//Java Program to calculate the area and circumference of circle

public class MathPIExample {

public static void main(String args[]) {

int radius = 50;

// Area = radius*radius*PI

double area = (radius * radius) * Math.PI;

System.out.println("Area of circle is " + area);

// Circumference = PI*radius*2

double circumference = radius * Math.PI * 2;

System.out.println("The circumference of the circle is " + circumference);

}

}

//Java Program to calculate the area and circumference of circle

public class MathPIExample {

public static void main(String args[]) {

int radius = 50;

// Area = radius*radius*PI

double area = (radius * radius) * Math.PI;

System.out.println("Area of circle is " + area);

// Circumference = PI*radius*2

double circumference = radius * Math.PI * 2;

System.out.println("The circumference of the circle is " + circumference);

}

}

###### Output

Area of circle is 7853.981633974483 The circumference of the circle is 314.1592653589793