RPL second impressions (HP 28)

[mdunn]

Just a few thoughts after having gone through the HP28 manuals... No need to answer...unless you really want to ;-) Probably best to figure out some things myself.

1. The manuals could be worse, but IMHO, could be a lot better too. Does anyone have, say, a one-page cheat sheet of high-level best practices and such?

2. For my first program of note, I'm attempting to translate an HP15 program I wrote a LONG time ago that generates prime numbers (based I think on an SR56 program, which in turn was based, I think, on a BASIC program). It ain't easy converting spaghetti to pure "structured" code...phew!

3. Wonder if IF..THENs can be nested...

4. I find the multiple ways of writing things a tad confusing (RPN, algebraic, etc?).
Here's just one example from my Primes thingy:

pseudocode:
IF FRAC(a/b)==0 THEN ...

Translates, I think, to something like:

RPN:
IF a b / FP 0 == THEN ... END
tho I guess this would be even MORE RPNish:
a b / FP 0 == IF THEN ... END
or:
a b / FP 0 IF == THEN ... END
:-)

Algebraic:
IF 'FP(a/b)==0' EVAL THEN ... END
THAT one took a while to figure out!

Other (better?) ways?