ListQ

ListQ[expr]

gives True if the head of expr is List, and False otherwise.

Examples

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Basic Examples  (2)

ListQ gives True when the head of an expression is List:

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ListQ gives False when the head of an expression is not List:

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ListQ gives False on other array representations:

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Properties & Relations  (3)

See Also

List  VectorQ  MatrixQ  ArrayQ

Introduced in 1991
(2.0)