using System;

public class Program

{

    public static void Main()

    {

        double r = 1.0; double pi = 3.1416;

        for (int i=1; i<=5; i++)

        {   

            while (r <= 5.0) 

        {

        r=r+ 1;

                double a = pi*r*r;

        }

            Console.Writeline("Area of a Circle: {0}",a);

    }

}

}