lua-users home
lua-l archive

[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index] [Thread Index]

Quoth Alexey Malyshev <>, on 2010-11-20 16:34:37 +0300:
> What's wrong with this code?

Nothing's "wrong" with it except that floating-point arithmetic isn't
doing what you expect but rather what it naturally does.

string.format('%.16f', 1+0.2+0.2+0.2+0.2+0.2)
  ==> "1.9999999999999998"

Go look on the Web regarding how binary fixed-precision floating-point
arithmetic often trips up people who are used to decimal arithmetic.

   ---> Drake Wilson