// Write a program to print the area of a circle.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace areaofcircle
{
    class Program
    {
        static void Main(string[] args)
        {
            int r;
            double a, p;
            p = 3.14;
            Console.WriteLine("Enter the value of radius");
            r = Convert.ToInt32(Console.ReadLine());
            a = p * r * r;
            Console.WriteLine("area" + a);
            Console.ReadLine();

        }
    }
}