Java示例计算因子

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);

   }

}