Problem with MVAR on HP42S

[Valentin Albillo]

(06-07-2020 08:09 PM)Pekis Wrote:  Hello,

It seems I forgot how to use MVAR on HP42S:

I entered this stupid program:
LBL "COS"
MVAR "X"
RCL "X"
COS
RTN

Then when I do XEQ "COS", the answer is "Nonexistent", instead of letting me enter a value and press "X" to calculate cosinus. Why ?

Change your MVAR "X" to INPUT "X" and see if it does what you want. No need to previously create the variable "X".

V.