using System;

public class Program

{

    public static void Main()

    {

​

        const string STAR = "*" ;

​

        const int COUNTER = 10;

        for ( int r =0; r < COUNTER; r ++)

        { 

            for (int c= 0; c <= r; c++)

            {

                Console.Write(STAR);

            }

            Console.WriteLine();

        }

        Console.WriteLine();

    }

}