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ValueQ

FilledSmallSquare ValueQ[expr] gives True if a value has been defined for expr, and gives False otherwise.

FilledSmallSquare ValueQ has attribute HoldFirst.

FilledSmallSquare ValueQ gives False only if expr would not change if it were to be entered as Mathematica input.

FilledSmallSquare See Section 2.3.5.

FilledSmallSquare See also: Information.

FilledSmallSquare New in Version 1.

Further Examples