using System;

public class Program

{

    public static void Main()

    {

        // Initiating array of ints:

        var array = new [] { 3, 4, 2, 9, 56, -34 };

        // Number of elements in the array:

        int length = array.Length;

        Console.WriteLine(length);

        // Element at a  position:

        int elementAt4position = array[4];

        Console.WriteLine(elementAt4position);

        // Iterating through all elements of the array:

        // for ...

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

        {

            Console.Write($"{array[i]},");

        }

        Console.WriteLine();

        // You can use any type in an array, lets try strings:

        string[] stringArray = new [] { "Łukasz", "Maciej", "Bartek", "Iza" };

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

        {

            var imie = stringArray[i];

            if (imie.Length > 3)

            {

                Console.Write($"{imie},");

            }

        }

​

    }

}