Confused about expressions in Prime RPN stack

[Orome]

(04-26-2020 06:21 PM)mchris Wrote:  I can not figure out what exactly you want to do with an algebraic expression in command line....I can't imagine in what situation 'your_expression' would be of any use in command line in RPN mode.

It's precisely of whatever use it was when it was being entered in the first place. (I can edit such an expression, for example.)

On 48s I can put it on the stack and then get it back and continue with whatever I was doing. On a Prime I can't get it back. So maybe one way of thinking abut the question is: why are the Prime semantics for picking different?