HP calculator with largest math (stats, logic, etc..) and data structure functions

[Ángel Martin]

(09-24-2018 01:41 PM)grsbanks Wrote:  

(09-24-2018 11:48 AM)JSBach Wrote:  The HP-15 had 2 parallel stacks, one for the real parts and one for the imaginary parts.
The HP-42 had something better: Every stack member could be a real or a complex number.

Very true, but entry of a complex number from its real and imaginary constituent parts uses two stack levels. What was in T when you enter a complex number is lost. This doesn't happen with the 15C.

Nor does it happen with the 41Z module ;-)

For example, the following sequence:

2, ENTER^, 1, ZENTER^
4, ENTER^, 3, ZENTER^
6, ENTER^, 5, ZENTER^
8, ENTER^, 7,

places the complex numbers in the complex stack:

U: 1+2i
V: 3+4i
W: 5+6i
Z: 7+8i