need help with FCAT program for HP 42S

[Joe Horn]

(05-22-2024 07:17 AM)Thomas Klemm Wrote:  If you wonder why LBL 14 is used and not LBL 99 to indicate a NO-OP: it is highest one-byte label.
From LBL 15 on they consume two bytes.

And then they give the precious byte away with a useless use of a RTN statement:

Code:

89 RTN
90 END

Although END returns from a subroutine the same way as RTN, RTN is a tad faster, which is especially noticeable when the subroutine is called many times in a loop. So RTN END is not a useless waste of one byte, but rather slightly improves execution time.