SpiralMatrix

using System;

class SpiralMatrix
{
    static void Main()
    {
        Console.Write("Enter a number in range[2...20]: ");
        int num = int.Parse(Console.ReadLine());
       int[,] spiralMatrix = new int[num, num];
        int row = 0;
        int col = 0;
        int number = 1;

        for (int i = 1; i<= num * num; i++)
        {

            while(true)
            {
                spiralMatrix[row, col] = number;
                if (col + 1 < num && spiralMatrix[row, col + 1] == 0)
                {
                    ++col;
                    ++number;
                }
                else break;
            }
          while(true)
          {
              spiralMatrix[row, col] = number;
              if (row + 1 < num && spiralMatrix[row + 1, col] == 0)
              {
                  ++row;
                  ++number;
              }
              else break;
          }
          while(true)
          {
              spiralMatrix[row, col] = number;
              if (col - 1 >= 0 && spiralMatrix[row, col - 1] == 0)
              {
                  --col;
                  ++number;
              }
              else break;
          }
          while (true)
          {
              spiralMatrix[row, col] = number;
              if (row - 1 >= 0 && spiralMatrix[row - 1, col] == 0)
              {
                  --row;
                  ++number;
              }
              else break;
          }
        }



            for (int printRow = 0; printRow < num; printRow++)
            {
                for (int printCol = 0; printCol < num; printCol++)
                {
                    Console.Write("{0,4} ", spiralMatrix[printRow, printCol]);
                }
                Console.WriteLine();
            }
    }
}