# Double-You Tee Eff! (Question Mark) Is this a known bug?

**URL:** <https://forum.kirupa.com/t/double-you-tee-eff-question-mark-is-this-a-known-bug/300445>\
**Category:** flash\
**Created:** [November 21, 2009, 4:26am UTC](https://forum.kirupa.com/t/double-you-tee-eff-question-mark-is-this-a-known-bug/300445 "2009-11-21T04:26:26Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![audiohominis](https://avatars.discourse-cdn.com/v4/letter/a/c68b51/32.png) [@audiohominis](https://forum.kirupa.com/u/audiohominis)\
**Post date:** [November 21, 2009, 4:26am UTC](https://forum.kirupa.com/t/double-you-tee-eff-question-mark-is-this-a-known-bug/300445/1 "2009-11-21T04:26:26Z")

</div>

It’s certainly new to me?:hair:

```php
trace(1*.1);//0.1
trace(2*.1);//0.2
trace(3*.1);//0.30000000000000004
trace(4*.1);//0.4
trace(5*.1);//0.5
trace(6*.1);//0.6000000000000001
trace(7*.1);//0.4
trace(8*.1);//0.5
trace(9*.1);//0.6000000000000001

```

Double-You Tee Eff indeed.;(

F.P.10