# Odd comparisons to NaN

**URL:** <https://forum.kirupa.com/t/odd-comparisons-to-nan/225911>\
**Category:** flash\
**Created:** [May 16, 2007, 5:25pm UTC](https://forum.kirupa.com/t/odd-comparisons-to-nan/225911 "2007-05-16T17:25:55Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![FizixMan](https://avatars.discourse-cdn.com/v4/letter/f/e9c0ed/32.png) [@FizixMan](https://forum.kirupa.com/u/FizixMan)\
**Post date:** [May 16, 2007, 5:25pm UTC](https://forum.kirupa.com/t/odd-comparisons-to-nan/225911/1 "2007-05-16T17:25:55Z")

</div>

```php

var a:Number = Number("asdf"); //results in setting a to NaN

trace(a); //traces NaN

trace(a > 0); //traces undefined
trace(a == 0); //traces false
trace(a >= 0); //traces true

```

I find it interesting in how the comparisons result in this example. Any simple explanations as to why this is?