# \_alpha not what I set it to

**URL:** <https://forum.kirupa.com/t/-alpha-not-what-i-set-it-to/158633>\
**Category:** Uncategorized\
**Created:** [August 10, 2005, 8:52pm UTC](https://forum.kirupa.com/t/-alpha-not-what-i-set-it-to/158633 "2005-08-10T20:52:26Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![flashead](https://avatars.discourse-cdn.com/v4/letter/f/46a35a/32.png) [@flashead](https://forum.kirupa.com/u/flashead)\
**Post date:** [August 10, 2005, 8:52pm UTC](https://forum.kirupa.com/t/-alpha-not-what-i-set-it-to/158633/1 "2005-08-10T20:52:26Z")

</div>

This isn’t a problem, more or less just something I noticed and wondered if there’s anyone who’s heard of a reason for why this is?

```auto
this.createEmptyMovieClip("myMC", 5);
for (var i = 0; i<101; i++) {
myMC._alpha = i;
trace(myMC._alpha);
}

```

When setting the alpha of a movie clip, if the value is something other than 0, 25, 50, 75 or 100 it actually sets it to a value slightly off with up to 6 decimal places… Why?