using System;

​

namespace Loop

{

    public class NestedForLoop

    {

        public static void Main(string[] args)

        {

            for (int i=1; i<=5; i++)

            {

                for (int j=1; j<=i; j++)

                {

                    Console.Write(j + " ");

                }

                Console.WriteLine();

            }

        }

    }

}