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Tests if a variable has been assigned. Returns the opposite values from unassigned().
Syntax
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truefalse = Assigned(variable) |
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Note: A null value is different from an unassigned value. A null value is a known, assigned value of . If a variable is unassigned it has an unknown value.
Note: The unassigned() function requires a function declaration. The assigned() function does not require a function declaration.
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True (1) if variable is assigned; false (0) if variable is unassigned.
See also
Example
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function RowExists(Table, Key) $insert Logical Exists = FALSE$ if assigned(Table) and assigned(Key) then open Table to Handle then read Row from Handle, Key then Exists = TRUE$ end end end return Exists |
