// Fig. 18.9: FactorialCalculator.java
// Iterative factorial method.

public class FactorialCalculator {
   // iterative declaration of method factorial   
   public static long factorial(long number) {
      long result = 1;

      // iteratively calculate factorial
      for (long i = number; i >= 1; i--) {
         result *= i;
      }

      return result;
   } 

   public static void main(String[] args) {
      // calculate the factorials of 0 through 10
      for (int counter = 0; counter <= 10; counter++) {
         System.out.printf("%d! = %d%n", counter, factorial(counter));
      }
   }
} 

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