Why does 0.1 + 0.1 + 0.1 - 0.3 evaluate to
5.5511151231257827e-17 in Python?
Why does 0.1 + 0.1 + 0.1 – 0.3 evaluate to 5.5511151231257827e-17 in Python?
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Why does 0.1 + 0.1 + 0.1 - 0.3 evaluate to
5.5511151231257827e-17 in Python?
Because that’s how floating point numbers work. If you want precise numbers, use the
decimalmodule. If you want to use floating point numbers, you have to remember to round them to a specific precision when you are displaying them.