On Sunday, September 2, 2018 at 5:16:16 PM UTC+2, ohir wrote: > > On Sun, 2 Sep 2018 07:23:55 -0700 (PDT) > Manlio Perillo <manlio....@gmail.com <javascript:>> wrote: > > > What happens if you need to divide 7 pennies by 4? > > I do not know about pennies peculiarities, so I'll stay with ¤ ;) > > I divide 70000µ¤ by 4 then It gives 17500µ¤. On customer account it > still is 17500µ¤ but on his statement it prints 0.018¤ (using 5/4 rounding > rules). The -500µ¤ goes to wherever local accounting law imposes on me. > > Surely with pennies I'd do same thing ;) > > > For financial applications you should use decimal floating-point > numbers. > And soon see pink slip. Or even go to jail. > > Then can I assume that all people using the Python decimal module are going to jail?
According to https://en.wikipedia.org/wiki/Floating-point_arithmetic, and to the decimal module documentation, Decimal is implemented using decimal floating point arithmetic. https://github.com/python/cpython/blob/master/Lib/_pydecimal.py#L509 Manlio -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
