HP Prime: how to insert and save formulas in a sort of "Equation library"

[pinkman]

(02-18-2020 06:03 AM)cyrille de brébisson Wrote:  Hello,

You can also create AVars (App Variables), which are not program variables...
a first call to
AVars("name"):=value
Will create the app variable. From there on, you can use it as a regular variable.

Cyrille

So I discover this functionality. Thanks, looks interesting.
A few questions:
- Why are AVars and DelAVars not mentioned in the catalog menu?
- Once an AVar is created, such as AVars(“vtest”):=123.456, what’s the difference between vtest:=654.321 and AVars(“vtest”):=654.321 ?