using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

         int[] input = { 1, 2, 3, 4, 5 };

            int result = Average_for(input);

            Console.WriteLine(result);

​

            int[] input1 = { 2, 4, 6, 8, 10 };

            int result1 = Average_while(input1);

            Console.WriteLine(result1);

    }

     public static int Average_for(int[] input)

        {

            var len = input.Length;

            var sum = 0;

            for (int i = 0; i < len; i++)

            {

                sum += input[i]; // + input[i + 1];

            }

            var avg = sum / len;

            return avg;

        }

​

        public static int Average_while(int[] input)

        {

            var i = 0;

            var sum = 0;

            while (i < input.Length )

            {

                sum += input[i];

                i++;

            }

​

            var avg = sum / input.Length;

            return avg;

​

        }

}