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