There is a lot to this suggestion, but please read it all, it’s worth it.
Declaring a variable changes how a variable is used, until that variable is next named in a Declare Variable action.
Action for Declare Variable has three values:
Variables:
A comma separated list of variable names.
Assign Out:
This option controls what happens when the value of an unset variable is referenced.
standard:
The variable reacts as at present.
unset:
When a variable is declared with this option, instead of