VarExists can be used to check whether a variable has been defined in the script during the previous
execution steps or not.
Syntax:
VarExists(@variable_name)
Example:
/*
Check whether the varilable exists
In this example the variable @notfound is not defined, therefore it will show the
message 'Variable not defined' during execution
*/
IF VarExists(@notfound)=FALSE THEN
PRINT 'Variable not defined!'
ELSE
PRINT 'Variable @notfound is defined'
END IF
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