lとIの違いが分からなくなる。

/**
 * Copyright paq ( http://wonderfl.net/user/paq )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/aVy2
 */

package {
    import flash.display.Sprite;
    import com.bit101.components.Label;
    public class FlashTest extends Sprite {
        public function FlashTest() {
            var lndex:int = 5;
            var Index:int = 2;
            new Label(this, 10,10, String(
            lndex + Index * Index * lndex / Index - lndex / lndex - Index
            ));
        }
    }
}