Cuadrado hueco Ejercicio C# - Curso de Programación C# (C Sharp)

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

class Program
{
    // Main method where the program execution begins
    static void Main()
    {
        // Prompt the user to enter a symbol for the square
        Console.Write("Enter a symbol: ");
        char symbol = Console.ReadKey().KeyChar; // Read a single character input from the user
        Console.WriteLine(); // Move to the next line after reading the symbol

        // Prompt the user to enter the width of the square
        Console.Write("Enter the desired width: ");
        int width = int.Parse(Console.ReadLine()); // Read and convert the width to an integer

        // Loop through the rows of the square
        for (int i = 1; i <= width; i++)  // Loop for each row
        {
            // Check if it's the first or last row
            if (i == 1 || i == width)  // If it's the first or last row
            {
                for (int j = 1; j <= width; j++)  // Loop through each column
                {
                    Console.Write(symbol);  // Print the symbol for the border
                }
            }
            else  // For the middle rows
            {
                Console.Write(symbol);  // Print the symbol for the left border
                for (int j = 2; j < width; j++)  // Loop through the middle columns
                {
                    Console.Write(" ");  // Print a space for the hollow part
                }
                Console.Write(symbol);  // Print the symbol for the right border
            }

            Console.WriteLine();  // Move to the next line after finishing the row
        }
    }
}