# Simple this\[\] syntax question

**URL:** <https://forum.kirupa.com/t/simple-this-syntax-question/324690>\
**Category:** flash\
**Created:** [September 3, 2011, 3:20pm UTC](https://forum.kirupa.com/t/simple-this-syntax-question/324690 "2011-09-03T15:20:15Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![sogj](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.kirupa.com/sogj/32/3189_2.png) [@sogj](https://forum.kirupa.com/u/sogj)\
**Post date:** [September 3, 2011, 3:20pm UTC](https://forum.kirupa.com/t/simple-this-syntax-question/324690/1 "2011-09-03T15:20:15Z")

</div>

Variable name definitions confuse me! Sorry for the simple question.

trace (MovieClip(root).blank1); //this traces properly  
trace (MovieClip(root).this[“blank”+1]); //this won’t compile

What’s the correct syntax?

And what is this called in case I need to google it later? ![](http://forum.kirupa.com/uploads/kirupa/5354/a0d2c7f4bbf584e2.gif)