Area of Circle

import java.util.Scanner;

public class AreaOfCircle {

public static void main(String args[]){

int radius;

double area;

Scanner sc = new Scanner(System.in);

System.out.println("Enter the radius of the circle ::");

radius = sc.nextInt();

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

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

}

}

Output