Programming the INT and FRAC functions

[Dieter]

(01-04-2016 07:45 PM)Didier Lachieze Wrote:  On the HP-55 [→H.MS] [→H.MS] uses 4 steps (keystrokes are not merged) so it's one step longer, but it's better because [.] [5] [–] doesn't work with negative numbers.

It depends – you might just as well say that it works even better. ;-)
Using [.] [5] [–] yields a FLOOR function. This is the way "INT" is implemented in many computer languages: it returns the largest integer ≤ x.
This way also a CEIL function could be added, since ceil(x) = –floor(–x).

Dieter