#adding doubles doesnt give the expected outcome

1 messages · Page 1 of 1 (latest)

west glacierBOT
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Helper please have a look, thanks.

gritty cloud
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huh

fringe elbow
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oops i deleted the question

gritty cloud
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0.1+0.2==0.3

fringe elbow
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yeah well

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this

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.-.

gritty cloud
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this is false because of how floatting points work

fringe elbow
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do you know how i can like

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fix it

gritty cloud
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they do a lot of rounding

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so you can't expect them to be extremely precise

fringe elbow
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hmm

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thats interesting

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do i like round it again

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to like 1 decimal point?

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does that fix it

gritty cloud
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so either you don't use floating points, and try to find a way by manipulating ints or something else, or use BigDecimal which has unlimited precision, or, simplest solution, instead of using ==, you use >= and <= with a very small nterval

fringe elbow
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thanks!

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ill try that

gritty cloud
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boolean areDoubleEqual(double a, double b, double gap) {
  return Math.abs(a - b) <= gap;
}
// Usage
if(areDoubleEqual(0.1+0.2, 0.3, 0.00001))
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@fringe elbow

fringe elbow
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thank you bro

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appreciate it

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lemme just

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copypaste that :)