When I try to calculate 700*0.7 in my code the result gets wrong.
Console shows 489.99999999999994 eventhough the correct result is 490. I really don't understood what the magic is this. Can anyone clarify it? Other numbers are calculated normally.
P.S. U can try this in console chrome. example1
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Denny John
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Fedor Petrenko
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[Detailed explanation](https://stackoverflow.com/a/21895757/540352) – Laoujin Jun 12 '17 at 09:28
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Possible duplicate of [Why Are Floating Point Numbers Inaccurate?](https://stackoverflow.com/questions/21895756/why-are-floating-point-numbers-inaccurate) – Christopher Moore Jun 12 '17 at 10:27
2 Answers
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That's some floating numbers issue: http://floating-point-gui.de/
Just round the result, and it should be good. :)
Jonathan Petitcolas
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Floating point arithmetic is not always 100% accurate. Use the standard Math library functions to be 100% sure of the results when dealing with floating numbers.
Peter
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