Rectangle C# Exercise - C# Programming Course

using System; // Importing the System namespace to use Console functionalities

class Program
{
    // Main method where the program execution begins
    static void Main()
    {
        int digit; // Declaring a variable to store the digit entered by the user

        // Asking the user to enter a digit and reading the input
        Console.Write("Enter a digit: ");
        digit = Convert.ToInt32(Console.ReadLine()); // Converting the input to an integer

        // Printing the top row of the rectangle with the digit repeated three times
        Console.WriteLine("{0}{0}{0}", digit); // Printing the digit three times in the first row

        // Printing the middle rows of the rectangle, each with the digit followed by a space and then the digit again
        for (int i = 0; i < 3; i++) // Loop to print three rows
        {
            Console.WriteLine("{0} {0}", digit); // Printing the digit with a space between them
        }

        // Printing the bottom row of the rectangle with the digit repeated three times
        Console.WriteLine("{0}{0}{0}", digit); // Printing the digit three times in the last row
    }
}