Meaning of ##

This query may sound very silly, but I want to clear my confusion.

Code:

Action  : Set : Invisibleflag : NOT ##Invisibleflag
    Title   : if ##Invisibleflag then $$LocaleString:"NarrationYes" else $$LocaleString:"NarrationNo"

What is the Meaning of ##InvisibleFlag?

Action: Set: InvisibleFlag : Not ##InvisibleFlag ( My confusion is about ##)

Invisible Flag is a Variable.

 

Indeed, invisibleflag is variable, also it is a Logical variable

Logical variables are like switches.. some times we need to on the switch and sometimes we need to off it.

Logical operator Not is best pair to the logical variables for this switching operation

So if invisible flag,if it is set to yes

The code
Action:set:invisible flag: not ##invisibleflag

Will revert it to No.

## is to call the value already set in any variable

So adding ## to a variable makes it a expression which will assign values to (another expression or variable) in the left hand side.

 

Thank you for the support