8bitrocket Daily Inter-Web Mash-Up – Tuesday, May 3, 2011


Tech Interview Question Tip – AS3 – Compute Factorial Iterative and Recursive

 import flash.display.Sprite;
  * ...
  * @author Jeff Fulton
 public class ComputeFactorial extends Sprite

  /*In mathematics, the factorial of a positive integer n,[1]
   * denoted by n!, is the product of all positive integers
   * less than or equal to n.
   * There are two methods. Recursion is the classic method
   * Code Complete says that recursion is a improper method
   * Second version is the code complete iteration version

  public function ComputeFactorial()

   //recusrive methos
   trace ("recursive:",recursiveFactorial(3));
   trace ("iterative:",iterativeFactorial(3));


  private function recursiveFactorial(num:int):int {
   if (num <= 1) {
   }else {
    return (num * recursiveFactorial(num - 1));

  private function iterativeFactorial(num:int):int {
   var result:int = 1;

   for (var factor:int = 2; factor <= num; factor++) {
    result = result * factor;

   return result;


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The 8bitrocket Daily Inter-Web Mash-up Briefing is compiled and edited by both Jeff D. Fulton and Steve A. Fulton.  We cover the world of retro games, new games, indie games, Flash / Web games, game coding, the toy industry, and anything else we find cool. Send news items that you would like covered to info[at]8bitrocket[dot]com

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