/* File: FacIt.java - March 2011 */
package l04;

/**
 * Compute and display the factorial of the input argument
 * using an iterative algorithm
 *
 * Sample usage: java l04.FacIt 5
 *
 * @author Michael Albert
 *
 */


public class FacIt{

   public static void main(String[] args) {
      int n = Integer.parseInt(args[0]);
      System.out.println(n + "! = " + factorial(n));
   }

  public static long factorial(int n) {
     long fac = 1;
     for(int i = 1; i <= n; i++) 
        fac *= i;
     return fac;
   }

}