using System;

public class Program

{

    public static void Main()

    {

        //Variables 

        string input;

        int size;

        bool loop = true;

        int s;

        double a;

        //get the size of the array from the user 

        do 

        {

            Console.WriteLine("please enter the size of the arrays as a whole number.");

            input = Console.ReadLine();

            loop = Int32.TryParse(input, out size);

            if(!loop)

            {

                Console.WriteLine("Invald entry. Please try again.");

            }

        }while(!loop);

        //create 3 Arrays 1 int 1 double 1 string 

        int[] sum = new int[size];

        double[] averge = new double [size];

        string[] pets = new string[size];

        //fill the int array with data from the user, using a for loop and double loop

        for(int i = 0; i < sum.Length; i++)

        {

                do 

            {

                Console.WriteLine("please enter a whole number.");

                input = Console.ReadLine();

                loop = Int32.TryParse(input, out sum[i]);

                if(!loop)

                {

                    Console.WriteLine("Invald entry. Please try again.");

                }

            }while(!loop);

        }

        //add up all the values in the int array

        s = 0;

        for(int i = 0; i < sum.Length; i++)

        {

            s = s + sum[i];

            Console.WriteLine(s);

        }

        Console.WriteLine("sum = " + s);

        a = 0;

    }

}