Convergents of a Continued Fraction

[Thomas Klemm]

(09-20-2024 10:24 PM)C.Ret Wrote:  One easy way to achieve this on an HP-15C is to use the complex-stack. I’m not sure if the same trick can be applied to other HP calculators that support complex arithmetic.

This program is for the HP-42S:

Code:

00 { 27-Byte Prgm }
01▸LBL A
02 RCL× ST Y
03 RCL+ ST Z
04▸LBL E
05 ENTER
06 COMPLEX
07 ÷
08 PSE
09 R↓
10 RTN
11▸LBL C
12 0
13 1
14 COMPLEX
15 1
16 END

To use it set LCLBL and select the CUSTOM menu.