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

namespace lesson5_potok4
{
    class Program
    {
        static void Main(string[] args)
        {
            var array = new[] { 1, 2, 3 };

            Console.WriteLine(Sum(array));
            /*int[] array = new int[4] { 1, 2, 3, 4};
            int[] array2 = new int[4];

            for (int i = 0; i < array.Length; i++)
            {
                array2[i] = array[i];
            }

            foreach(int n in array)
            {
                Console.WriteLine(n);
            }

            Change(array2);

            Console.WriteLine();

            foreach (int n in array)
            {
                Console.WriteLine(n);
            }

            /*int[] arrayOneDim = new int[4];

            for(int i = 0; i < arrayOneDim.Length; i++)
            {
                arrayOneDim[i] = int.Parse(Console.ReadLine());
            }

            Console.WriteLine();

            for (int i = 0; i < arrayOneDim.Length; i++)
            {
                Console.WriteLine(arrayOneDim[i]);
            }

            foreach(int number in arrayOneDim)
            {
                Console.WriteLine(number);
            }

            Console.WriteLine();

            int[,] arrayMultDim = new int[2, 2];

            for (int i = 0; i < arrayMultDim.GetLength(0); i++)
            {
                for(int j = 0; j < arrayMultDim.GetLength(1); j++)
                {
                    arrayMultDim[i, j] = int.Parse(Console.ReadLine());
                }
            }

            Console.WriteLine();

            for (int i = 0; i < arrayMultDim.GetLength(0); i++)
            {
                for (int j = 0; j < arrayMultDim.GetLength(1); j++)
                {
                    Console.Write(arrayMultDim[i, j] + "\t");
                }
                Console.Write("\n");
            }

            Console.WriteLine();*/

            /*int[][] array2 =
            {
                new int[]{ 0, 2, 4, 5},
                new int[]{ 1, 2}
            };

            for(int i = 0; i < array2.Length; i++)
            {
                for(int j = 0; j < array2[i].Length; j++)
                {
                    Console.Write(array2[i][j] + "\t");
                }
                Console.Write("\n");
            }

            for (int i = 0; i < array2.Length; i++)
            {
                foreach(int number in array2[i])
                {
                    Console.Write(number + "\t");
                }
                Console.Write("\n");
            }

            foreach (int[] array in array2)
            {
                foreach(int number in array)
                {
                    Console.Write(number + "\t");
                }
                Console.Write("\n");
            }

            //Console.WriteLine(array2.Length);*/
        }

        static int Sum(params int[] array)
        {
            int sum = 0;

            foreach(int n in array)
            {
                sum += n;
            }

            return sum;
        }

        static void Change(int[] array)
        {
            array[1] = 10000;
        }

        static void Change(string array)
        {
            array = array.Substring(0, array.Length / 2);
        }
    }
}