Area of a circle is the product of the square of its radius, and the value of PI, Therefore, to calculate the area of a rectangle
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); } }
Enter the radius of the circle :: 55 Area of the circle is ::9503.317777109125