/* Pattern

      1 

     1 2 

    1 2 3 

   1 2 3 4 

  1 2 3 4 5 

 1 2 3 4 5 6 

1 2 3 4 5 6 7

*/

​

using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("enter the no of rows");

        int num = Convert.ToInt32(Console.ReadLine());

            Console.WriteLine(" ");

            Console.WriteLine("OUTPUT:");

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

        {

            for (int k = 1; k <=num-j;k++)

            {

                Console.Write(" ");

            }

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

            {

                Console.Write(i.ToString());

              Console.Write(" ");

          }

            for(int l=j-1;l>=num;l--)

            {

                Console.Write(l.ToString());

            }

                    //Console.WriteLine();  

            Console.WriteLine();

           }

            Console.WriteLine('\n');

                    }

    }

​

​

​