alt Hacker NewsThe rounding behavior with true decimals is easy to control and understand across number magnitudes and doesn't suffer from platform specific quirks like floats/doubles.
The article's images clearly show the rounding error mess your get without decimals.
Replies
amelius • today at 12:39 PM
But the rounding errors are way down in the nano-cents. Not worrying about them is cheaper!
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There's still catastrophic cancellation, where subtracting two large numbers that are very close results in an answer with reduced precision.