C# Exercise: 57 Display a function

using System;  // Import the System namespace to use basic classes like Console

class Program  // Define the main class of the program
{
    static void Main()  // The entry point of the program
    {
        // Iterate over integer values of x from -1 to 8
        for (int x = -1; x <= 8; x++)  // Start from x = -1 and loop until x = 8
        {
            // Calculate the value of the function y = (x - 4)^2
            int y = (x - 4) * (x - 4);  // Function formula: y = (x - 4)^2

            // Print the asterisks corresponding to the value of y
            for (int i = 0; i < y; i++)  // Loop to print y number of asterisks
            {
                Console.Write("*");  // Print an asterisk for each iteration
            }

            // Move to the next line after printing the asterisks
            Console.WriteLine();  // Go to the next line after the current row of asterisks
        }
    }
}