1024!

/**
 * Copyright yinaak ( http://wonderfl.net/user/yinaak )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/ELhJ
 */

package {
    import flash.text.TextField;
    import flash.display.Sprite;
    [SWF(backgroundColor='#cccccc')]
    public class FlashTest extends Sprite {
       
        public function FlashTest() {
            var tf:TextField = new TextField();
            tf.autoSize = 'left';
            tf.borderColor = 0xcccccc;
            tf.border = true;
            addChild(tf);
            var res:Number = fact(1024);
            tf.text = "result: " + res;
        }
        
        public function fact(input:int):Number {
            var sum:Number = 1;
            for each(var v:int in (new Array(input+1)).sort(Array.RETURNINDEXEDARRAY)) {
                sum = v < 1 ? 1 : (sum * v);
            }
            return sum;
        }

    }
}