IsEmpty Function |
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Syntax
IsEmpty(expression)
The expression argument can be any expression. However, because IsEmpty is used
to determine if individual variables are initialized, the expression argument
is most often a single variable name.
Remarks
IsEmpty returns True if the variable is uninitialized, or is explicitly set
to Empty; otherwise, it returns False. False is always returned if expression
contains more than one variable.
The following example uses the IsEmpty function to determine whether a variable has been initialized:
related toDim MyVar, MyCheck
MyCheck = IsEmpty(MyVar) ' Returns True.
MyVar = Null ' Assign Null.
MyCheck = IsEmpty(MyVar) ' Returns False.
MyVar = Empty ' Assign Empty.
MyCheck = IsEmpty(MyVar) ' Returns True.
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