Plus42 algebraic expressions update

[Thomas Okken]

(03-06-2021 04:38 PM)Vincent Weber Wrote:  Reading again this interesting discussion made me think of something: the 35S handles equations in programs not by pointing to the equation list using a name, but directly: you enter the equation in the program by pressing EQN, this puts the equation in the program as a single step, directly readable when reviewing the program. Quite convenient. A flag indicates whether this step should be treated as a mere comment (just text to be ignored) or as an actual equation to evaluate.

It looks like it would be useful to have an instruction for creating long strings directly on the stack, without using the ALPHA register and ASTO/XASTO. And that would allow putting equations right into a program as well.

It's not clear to me what the interaction of such an inline-long-string-treated-as-equation with the rest of the equation functionality should be, though. Could you give one or two examples how evaluating or solving in-line equations works in the 35S?