Golang不会增加0.1 [重复]

Question

This question already has an answer here:

• Why are floating point numbers inaccurate? 6 answers

Following Go code

for i := 0.0 ; i < 5 ; i+=0.1 { fmt.Printf("%v, ", i) }

results in this (partial) output

0, 0.1, 0.2, 0.30000000000000004, 0.4, 0.5

Why am I getting 0.30000000000000004 instead of 0.3?

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Answer 1

Short answer: It has to do with how numbers are stored in a computer.

Specifically for GoLang you might want to read "Floating Point Numbers"