Circumference Of Circle Example Java Program


Definition

Circumference is the linear distance around the edge of a closed curve or circular object. The circumference of a circle is the distance around it. Pi is defined as the ratio of a circle's circumference C to its diameter d Or, equivalently, as the ratio of the circumference to twice the radius.

Formula

C=pi*d=2*pi*r

where,
C is the circumference of the circle of radius r
d is the diameter of the circle
pi is a constant which is denoted as ? and its value is 3.14159 26535 89793

Circumference Of Circle Example Program

import java.util.Scanner;

class CircumferenceOfCircle{
	static Scanner in = new Scanner(System.in);
	public static void main(String args[]){
		System.out.print("Enter the radius: ");
		double radius = in.nextDouble();
		double circumference= Math.PI * 2*radius;
		System.out.println( "The circumference of the circle is:"+circumference) ;
	}
}

Sample Output

Output is:
Enter the radius: 5
The circumference of the circle is:31.41592653589793