问题
when i make this multiplication
0.94 * 8700
the output is
8177.999999999999
but it should have been
8178
i\'m using java , but i don\'t think this error is related to a particular Programming language
now my question is ... why this happened ??
and what other numbers (just as an example) cause the same error?
回答1:
The specific reason in your case is that the real number 0.94 cannot be represented exactly in a double precision floating point. When you type 0.94, the actual number stored is 0.939999999999999946709294817992486059665679931640625.
回答2:
It isn't an error. IEEE floats can't represent decimal numbers exactly.
来源：https://stackoverflow.com/questions/7581741/floating-point-error-in-representation