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Q&A Why is it considered bad practice to use float for representing currency?

This is intended to be a canonical post for this problem which is pretty common. Especially among beginners. I've heard that I should avoid using floating point variables for representing curren...

2 answers  ·  posted 3y ago by klutt‭  ·  last activity 3y ago by klutt‭

#3: Nominated for promotion by user avatar Alexei‭ · 2022-02-13T11:44:40Z (almost 3 years ago)
#2: Post edited by user avatar klutt‭ · 2021-09-13T09:46:56Z (about 3 years ago)
#1: Initial revision by user avatar klutt‭ · 2021-09-13T09:38:55Z (about 3 years ago)
Why is it considered bad practice to use float for representing currency?
*This is intended to be a canonical post for this problem which is pretty common. Especially among beginners.*

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I've heard that I should avoid using floating point variables for representing currency. What is the reason for that? Representing 123 dollars and 67 cents as 123.67 seems quite natural.