Java Program to Find Area and Circumference of Circle

import java.util.*;
public class Main
{
   public static void main(String args[])
   {
       //radius value declared
      double r = 1;
      //Finding area of circle
      double area = Math.PI * (r * r);
      System.out.println("Area of circle : " + area);
      //Finding circumference of circle
      double circumference= Math.PI * 2*r;
      System.out.println( "Circumference of the circle : "+circumference) ;
   }
}

Output:

Area of circle : 3.141592653589793
Circumference of the circle : 6.283185307179586