RPL second impressions (HP 28)

[Thomas Klemm]

(06-27-2018 05:11 PM)mdunn Wrote:  should (...) have local variables, etc.

It's been a while since I wrote an RPL program. I tried to keep it similar to your solution:

Code:

\<<  1
  WHILE 1
  REPEAT
    2 +
    \<< \-> n t
      \<<
        IF n t MOD NOT
        THEN
          n 2 +
          1
        ELSE
          IF t SQ n >
          THEN
            1245 .3 BEEP
            n HALT
            n 2 +
            1
          ELSE
            n t
          END
        END
      \>>
    \>> EVAL
  END
\>>

Here's how your global variables correspond to the local variables:

• Primes: n
• TestDiv: t
  

Still I have the impression we could improve on that.

Quote:(...) should really be two programs

Do you mean like ISPRIME? and NEXTPRIME of the HP 50g?