HP 50g Double factorial

[FLISZT]

(01-28-2024 02:51 PM)DavidM Wrote:  

(01-28-2024 01:47 AM)FLISZT Wrote:  ...But for me, it was just an exercise, I don't need to calculate double factorials.

That goes doubly for me (pun partially intended).

I believe the last time I wrote some calculator-based code for something that I actually needed was somewhere around 2010. Everything else has been for amusement or personal edification.

Got it!

Same here: apart from my TI-57 and 15C, I've bought my other calculators for neither school nor professional purposes.
As for my first calculator (Sanyo CZ-0124), it was a gift from my paternal grandfather, a few days before Christmas (my grandmother had just died in mid-December) and I was in junior high school and still very young! It was not a (RPN) CZ-2901 (was it ever sold in France?), however, my calculator had/has in a wondeful key: X⇆Y