//*******************************************************************
// DemoFactorial.java
//*******************************************************************

public class DemoFactorial
{
   public static int factorial(int N)
   {

      if (N == 0)
      {  // Base case
	 return(1);
      }
      else
      {
         int sol;
         int solX;

	 sol = factorial(N-1);   // Solve smaller problem
	 solX = sol * N;	 // Solve Problem X using sol

	 return(solX);
      }
   }

   public static void main (String[] args)
   {
      System.out.println ("Factorial of 6 is " + factorial(6));
      System.out.println ("Factorial of 10 is " + factorial(10));
      System.out.println ("Factorial of 11 is " + factorial(11));
      System.out.println ("Factorial of 12 is " + factorial(12));
      System.out.println ("Factorial of 13 is " + factorial(13));
   }  // method main

}