Summation on HP 42S

[Thomas Klemm]

A somewhat different approach using ∑+:

Code:

00 { 10-Byte Prgm }
01 CL∑
02 0
03▸LBL 00
04 ∑+
05 X≤Y?
06 GTO 00
07 SUM
08 END

Or then for \(n>0\) simply:

Code:

00 { 7-Byte Prgm }
01 1
02 +
03 2
04 COMB
05 END

Cheers
Thomas