# Casting string to number doesn't work!

**URL:** <https://forum.kirupa.com/t/casting-string-to-number-doesnt-work/313999>\
**Category:** flash\
**Created:** [September 15, 2010, 8:39pm UTC](https://forum.kirupa.com/t/casting-string-to-number-doesnt-work/313999 "2010-09-15T20:39:24Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Bojan](https://avatars.discourse-cdn.com/v4/letter/b/b782af/32.png) [@Bojan](https://forum.kirupa.com/u/Bojan)\
**Post date:** [September 15, 2010, 8:39pm UTC](https://forum.kirupa.com/t/casting-string-to-number-doesnt-work/313999/1 "2010-09-15T20:39:24Z")

</div>

[SIZE=3][FONT=Calibri]Hi,[/FONT][/SIZE]  
[SIZE=3][FONT=Calibri]I have Input text field on Scene with instance name _ **number\_txt** _.[/FONT][/SIZE]  
[SIZE=3][FONT=Calibri]This example throws **NaN** in otput window.[/FONT][/SIZE]  
[SIZE=3][FONT=Calibri]Why?[/FONT][/SIZE]  
[SIZE=3][FONT=Calibri]Thanks[/FONT][/SIZE]

```auto
 
this.onMouseDown=function()
{
 trace(Number(number_txt.text));
}

```