Floating Point GUI

If you've ever written code and gotten a surprising result like 0.1 + 0.2 = 0.30000000000000004 instead of 0.3, you've run into floating-point numbers — and you're definitely not alone. This website exists to answer the questions that come next: Why did that happen? Is my code broken? How do I fix it?

The site tackles floating-point numbers from two angles. If you just want a quick, straightforward answer to a common question, you'll find that. But if you want to understand what's actually happening under the hood — how computers store decimals in binary, why certain calculations are imprecise, and when floating-point numbers are the right choice — there's deeper material too. It bridges the gap between "my math is wrong" panic and actual understanding.

This is most useful for beginner and intermediate programmers who encounter floating-point quirks and want clarity without needing a computer science degree. It's also handy for anyone choosing between different number types in their code — like deciding whether to use floating-point, fixed-point, or decimal representations. The site doesn't just say "floating-point is weird"; it explains why, and what your options are.

The website itself is built using nanoc, a static site generator that compiles content into plain HTML files. This keeps it fast and simple to host. The content is published under a Creative Commons license, so it's free to use and share.