undefined variable

Scripting Forums AppleScript | Mac OS X
#1

How is the best way to ask applescript if a variable is undefined?

Is it just to do:

try
	if x="" then
	end if
on error
	display dialog "no x!"
end try

??

thank you.

#2

You can’t test for the existence of a variable, as far as I know. I would simply try/end try:

try
	x
on error
	--> x undefined
end try
#3

ah ok… Thank you very much.