Using trunc function in Erlang
Tue Jan 3 02:26:57 CET 2006
On 31/12/2005, at 5:50 AM, Erlang Questions wrote:
> I was afraid about that.
> Unfortunately, these numbers represent money in my application :o(
Never, under any circumstance, without exception, ever use floating
point to represent money.
You can use integers, fixed point, decimals, rationals or improper
fractions. All provide various tradeoffs, but all are infinitely
superior to floating point.
Worse, as people have already mentioned, there can be legal
ramifications as there are unavoidable errors in floating point
calculations that cannot always be reconciled with statutory rounding
Andrae Muys (who learnt this lesson the hard way, and once had to
spend several painful months converting a financial application from
floating point to decimal)
Principal Kowari Consultant
Netymon Pty Ltd
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