Find area and circumference of a circle

Find area and circumference of a circle

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace ConsoleApplication35

{

    class Program

    {

        static void Main(string[] args)

        {

            float r;

            Console.WriteLine("enter the radius of circle:");

            r = float.Parse(Console.ReadLine());

            double area = ((3.14) * (r * r));

            double circumference = (2 * (3.14) * r);

            Console.Write("area of circle="+area+"\n"+"circumference of circle="+circumference);

            Console.ReadLine();

        }

    }

}

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