Function Factorial C# Exercise - C# Programming Course

// Importing the System namespace to access basic system functions
using System;

class Program
{
    // Main method where the program starts
    public static void Main()
    {
        // Calling the Factorial function with the number 6 and printing the result
        Console.WriteLine(Factorial(6)); // The factorial of 6 is 720, which will be printed
    }

    // Recursive function to calculate the factorial of a number
    public static int Factorial(int n)
    {
        // Base case: if n is 1 or less, return 1 (because 1! = 1 or 0! = 1)
        if (n <= 1)
        {
            return 1; // Factorial of 1 or less is 1
        }
        
        // Recursive case: n * factorial of (n-1)
        return n * Factorial(n - 1); // Multiply n by the factorial of (n-1)
    }
}