101
Big Decimals: Stop Using Floats or Cents for Money
(medium.com)
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this post was submitted on 24 Sep 2025
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Programming
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That doesn't make any sense. As you say, in that case you have to "spread leftovers", but that isn't really any more difficult with floats than integers.
It's better to use integers, sure. But you're waaaay over-blowing the downsides of floats here. For 99% of uses
f64will be perfectly fine. Obviously don't run a stock exchange with them, but think about something like a shopping cart calculation or a personal finance app. Floats would be perfectly fine there.As you said, better use integers. And that's exactly what is done at this point.
Indeed, but there's no need to shit on people using floats because in almost all cases they are fine too.
Where the heck did I "shit on people using floats"?
As someone who has implemented shopping carts, invoicing solutions and banking transactions I can assure you floats will be extremely painful for you.
A huge benefit of big decimals is that they don't allow you to make a mistake (as easily) as floats where imprecision just "creeps in".