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Title:
How To Determine Variable Existance
I would like to know if it is possible to test for the existance of a variable. I need to do this because the fact that a particular variable does or does not exist provides information I need for processing. Of course, if I test the value of a non-existant global variable, I get an error msg. If this is possible, I would like to know the command, syntax, etc.
Thanks.
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