C# float bug? 0.1 - 0.1 = 1.490116E-08

Question

What\'s going on?! Subtraction works fine until I get to 0.1 - 0.1. I\'m in visual c# 2008 using the nonoba.com API.

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Answer 1

You obviously need to read "What Every Computer Scientist Should Know About Floating Point Numbers".

Instead of thinking that I've found a bug in situations like this, I usually assume that one of my assumptions needs checking first.