Calculating Factorial in java pgm

Calculating Factorial

public class MainClass 

{

   public static void main(String args[]) 

   {

      for (int counter = 0; counter <= 10; counter++)

       {

         System.out.printf("%d! = %d\n", counter,

         factorial(counter));

      }

   }

   public static long factorial(long number) 

   {

      if (number <= 1)

         return 1;

      else

         return number * factorial(number - 1);

   }

}