using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
 
namespace ConsoleApplication2
{
    class Program
    {
        static void Main(string[] args)
        {
            try
            {
                string i;
 
                string j;
 
                int m;
 
                int n;
 
                int no_of_rows = 0;
 
                int no_of_columns = 0;
 
 
 
                Console.WriteLine("Enter the number of rows ");
 
                i = Console.ReadLine();
 
                no_of_rows = Convert.ToInt32(i);
 
 
 
                Console.WriteLine("Enter the number of columns ");
 
                j = Console.ReadLine();
 
                no_of_columns = Convert.ToInt32(j);
 
                for (n = 0; n < no_of_rows; n++)
                {
                    
                    for (m = 0; m < no_of_columns; m++)
                    {
 
                        Console.Write(n.ToString()+m.ToString()+" ");
 
                    }
 
                    Console.WriteLine(" \n ");
 
                }
 
            }
 
            catch (Exception e)
            {
 
                Console.WriteLine("Exception occured: " + e.Message);
                
            }
    }
        }
    }
 

Enter the number of rows
4
Enter the number of columns
4
 
00 01 02 03
 
10 11 12 13
 
20 21 22 23
 
30 31 32 33