using System;

​

public class PyramidLoop

{

    public static void Main()

    {

        string userinput = "exit";

        int i;

        int j; 

        int n; 

        Console.Write("Display the pattern like pyramid:\n");

        Console.Write("-----------------------------------");

        Console.Write("\n");

        while (true)

        {

            Console.WriteLine();

            Console.Write("Input number of rows for this pattern type <exit> to stop the loop: ");

            userinput = Console.ReadLine();

            if (userinput == "exit")

            {

                Console.WriteLine("You've stop the loop! ");

                break;

            }

​

            {

                n = Convert.ToInt32(userinput); 

            }

​

            for (i = 0; i <= n; i++) 

            {

                for (j = 1; j <= n - i; j++) 

                    Console.Write(" ");

                for (j = 1; j <= 2 * i - 1; j++)

                    Console.Write("*");

                Console.Write("\n");

            }

        }

    }

}