Core Function IsDeclared
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=== Return Value === | === Return Value === | ||
| − | Success: Returns | + | Success: Returns true if variable has been assigned. |
| − | Failure: Returns | + | Failure: Returns false if variable doesn't exist yet. |
=== Remarks === | === Remarks === | ||
Revision as of 23:12, 25 August 2013
IsDeclared( <variable name>, <flag> )
Contents |
Description
Check if a variable has been declared
Parameters
variable name
String representing name of the variable to be checked.
flag
Optional; Flag to decide the scope to be checked.
0 = ANY scope (Should be Local first then Global) (Default) 1 = Local scope only 2 = Global scope only
Return Value
Success: Returns true if variable has been assigned.
Failure: Returns false if variable doesn't exist yet.
Remarks
Example
If (!IsDeclared("a")) MsgBox('$a is NOT declared'); // $a has never been assigned $a=1; If (IsDeclared ("a")) MsgBox('$a IS declared'); //due to previous $a=1 assignment
