Method_Ex_1 (Wk-8) Feb 24-28, 2014

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

namespace Method_Ex_1
{
    class Program
    {
        static void Main(string[] args)
        {   //Get the value of radius from user
            double radius;
            Console.Write("Enter radius: ");
            double.TryParse(Console.ReadLine(), out radius);

            //call the AreaOfCircle method
            double area = AreaOfCircle(radius);
            //call the PerimeterOfCircle
            double perimeter = PerimeterOfCircle(radius);

            //Calling method is alike "a goto"
            //The value of radius is passed (copied) to
            //the parameter r (in the method definition)

            Console.WriteLine("Area: {0}", area.ToString("f3"));
            Console.WriteLine("Perimeter: {0}", perimeter.ToString("f3"));

            Console.ReadKey();
        }
        static double AreaOfCircle(double r)
        {
        double a = Math.PI * r * r;
        return a;
        }
        static double PerimeterOfCircle(double r)
        {
            double p = 2 * Math.PI * r;
            return p;
        }
    }
}