Julia EvansFeb 8, 2023
Why does 0.1 + 0.2 = 0.30000000000000004? https://jvns.ca/blog/2023/02/08/why-does-0-1-plus-0-2-equal-0-30000000000000004/
Why does 0.1 + 0.2 = 0.30000000000000004?

Why does 0.1 + 0.2 = 0.30000000000000004?

Julia Evans
Show threadAlexandre B A Villares 🐍Feb 9, 2023

@b0rk wonderful post! I always struggle to explain that. Now I can point learners to your post.

Would it make sense for you to add a small mention of Python's Decimal class in the standard library as a possible workaround in certain situations?

Show threadFábio Costa 🐇🕐🎩☕
@villares @b0rk IBM solved this on architecture level by implementing a low level Decimal Binary floating point where the operations are done on "decimal" instead of "binary". Ensure the precision, but there's an obvious storage and memory cost
Feb 9, 2023 at 2:33pmWeb