using System;

public class Program

{

    public static void Main()

    {

        int[] nums=new int[3];

        nums[0]=10;

        nums[1]=20;

        nums[2]=30;

        for(int j=0; j<nums.Length; j++)//telling array length is a must

        {

            Console.WriteLine(nums[j]);

        }

        /*foreach(int k in nums)

        {

            Console.WriteLine(k);

        }*/

    }

}