[ Telerik C#] LOOPS - EX 14 Spiral Matrix

// * Write a program that reads a positive integer number N (N < 20)
//   from console and outputs in the console the numbers 1 ... N numbers arranged as a spiral.

using System;

namespace ex14___SpiralMatrix
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.Write("Enter N: ");
            int n =Int32.Parse(Console.ReadLine());
            int[,] matrix = new int[n, n];
            int row = 0;
            int col = 0;
            string direction = "right";
            int maxRotations = n * n;

            for (int i = 1; i <= maxRotations; i++)
            {
                if (direction == "right" && (col > n - 1 || matrix[row , col] != 0))
                {
                    direction = "down";
                    col--;
                    row++;
                }
                if (direction == "down" && (row > n - 1 || matrix[row, col] != 0))
                {
                    direction = "left";
                    col--;
                    row--;
                }
                if (direction == "left" && (col < 0 || matrix[row, col] != 0))
                {
                    direction = "up";
                    col++;
                    row--;
                }
                if (direction == "up" && (row < 0 || matrix[row, col] != 0))
                {
                    direction = "right";
                    col++;
                    row++;
                }

                matrix[row, col] = i;
                if (direction == "right")
                {
                    col++;
                }
                if (direction == "down")
                {
                    row++;
                }
                if (direction == "left")
                {
                    col--;
                }
                if (direction == "up")
                {
                    row--;
                }
            }

            // Display Matrix

            for (int r = 0; r < n; r++)
            {
                for (int c = 0; c < n; c++)
                {
                    Console.Write("{0,4}", matrix[r,c]);
                }
                Console.WriteLine();
            }
        }
    }
}