Find Area of a Circle in Java

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

• Get the radius of the circle.
• Calculate the square of the radius.
• Calculate the product of the value of PI and the value of the square of the radius.
• Print the result.

Example

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

Enter the radius of the circle ::
55
Area of the circle is ::9503.317777109125