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Triangle next to labels in program listing?

Posted: Sat Oct 17, 2020 1:49 am
by BobVA
More of an HP-42 question, but I thought someone might know:

I noticed that when I print a program there is a triangle character (0x86) inserted to the right of the line number on label statements (local or global). I can't find any mention of this in this in the HP42 manual, and it doesn't show up in any of the example listings.

Is this just for readability? Or is there some other significance?

Re: Triangle next to labels in program listing?

Posted: Sat Oct 17, 2020 2:09 am
by Thomas Okken
It is just for readability. When reading a program and trying to follow the flow of control, those arrows help in finding the labels.

Other HP calculators also do this, but using different characters. The HP-97 and HP-19C print an asterisk, and the HP-41C / HP-82143A print a diamond.

Re: Triangle next to labels in program listing?

Posted: Sat Oct 17, 2020 10:57 pm
by BobVA
Thank you!