using System; 

public class Test 

{  

    public static int factorial(int n) 

    { 

        if (n == 0) 

            return 1; 

        return n * factorial(n - 1); 

    }

    public static void Main() 

    { 

        int num = 5; 

        Console.WriteLine("Factorial of "+ num + " is " + factorial(5)); 

    } 

}