Micro-challenge: Special Event

[Thomas Klemm]

(12-26-2022 02:00 PM)Thomas Klemm Wrote:  \(
\begin{align}
\pi = 2 + \frac{1}{3}\left(2 + \frac{2}{5}\left(2 + \frac{3}{7}\left(2 + \cdots \right)\right)\right)
\end{align}
\)

Here’s a program for the HP-42S to calculate \(\pi\):

Code:

00 { 22-Byte Prgm }
01 2
02▸LBL 00
03 RCL× ST Y
04 2
05 RCL× ST Z
06 1
07 +
08 ÷
09 2
10 +
11 DSE ST Y
12 GTO 00
13 END

Example

40 R/S

3.14159265359