Loops and Arrays

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

namespace ArraysAndLoops
{
    class Program
    {

        /*This program will have three methods
         * one to create an array
         * one to populate it
         * and one to display it
         */
        static void Main(string[] args)
        {
            Program p = new Program();
            string exit = "y";
            while (exit != "n" && exit !="N")
            {
                p.CreateArray();
                Console.WriteLine("Do you want to continue y/n");
                exit = Console.ReadLine();
            }
            p.PauseIt();
        }

        //this method
        //creates an array
        private void CreateArray()
        {

            Console.WriteLine("How many payments do you want to enter?");
            int number = int.Parse(Console.ReadLine());
            double[] payments= new double[number];

            FillArray(payments, number);

            //double[] pmts = new double[] { 12.95, 34, 21.4, 43 };
            //payments[0] = 255;
            //payments[1] = 34.5;
            //payments[2] = 44.5;
            //payments[3] = 34;
            //payments[4] = 34.5;


        }

        private void FillArray(double[] payArray, int size)
        {
            //for loop
            for (int i=0; i < size; i++)
            {
                Console.WriteLine("Enter a payment");

                payArray[i] = double.Parse(Console.ReadLine());
            }//end for
            DisplayArray(payArray, size); //call DisplayArrayMethod
           
        }//end fill array

        private void DisplayArray(double[] pmt, int size)
        {
            Console.WriteLine("***********************");
            int x = 0;
            while (x < size)
            {
                Console.WriteLine(pmt[x]);
                x++;

                /*
                 * +=  (number += 10) same as (number= number + 10);
                -= minus (number -=10) same as (number=number-10)
                -- decrement subtract one each time
                *= (number *=10) same as (number=number*10)
                %=(number %=10) same as (number=number%10)
                /=(number /=10) same as (number=number/10)
                  */
            }//end while
            Sum(pmt, size);
        } //end display

        private void Sum(double[] payment, int size)
        {
            double total = 0;
            for (int i = 0; i < size; i++)
            {
                total += payment[i];
                //weight = grades[i] * credits[i];
            }
            double average = total / size;
            Console.WriteLine("the total is {0}", total);
            Console.WriteLine("the Average is {0}",average);
        }

        private void PauseIt()
        {
            Console.WriteLine("Press any key to exit");
            Console.ReadKey();
        }//end PauseIt



    }//end class
}