On 18.03.2023 05:14, Kaz Kylheku wrote:
> On 2023-03-17, Janis Papanagnou <janis_papanagnou+ng@hotmail.com> wrote:
>> On 17.03.2023 12:20, Kenny McCormack wrote:
>>> Second, is it enough to just add 50 before doing the division? I.e., change
>>> it to:
>>>
>>> strftime("%T",($14+$15+50)/100,1)
>>>
>>> Would it be that easy?
>>
>> That depends on your (rounding-)requirements. Your approach is the
>> simple "always upwards rounding at .5", other applications may want
>> to round up or down depending on the preceding digit. (In the GNU
>
> I think, fancy decimal rounding rules are mainly for money?

Given that there had been hacks in the past where sub-cent amounts
in financial transactions had been accumulated on separate fraud
accounts we might get the impression that rounding applications is
least for money. ;-)

My thought where it matters would have been in numerical math, e.g.
in hydrodynamic and/or chaotic systems where rounding accumulations
would matter most.

Anyway, I do most of my computation in non-FP, so I am not too much
concerned, but physicists may be.

Janis