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FilledSmallSquareDepth[expr] gives the maximum number of indices needed to specify any part of expr, plus one.

FilledSmallSquare Raw objects have depth 1.

FilledSmallSquare The computation of Depth does not include heads of expressions.

FilledSmallSquare See The Mathematica Book: Section 2.1.7.

FilledSmallSquare See also: TensorRank, Level, LeafCount, Length, Nest.

Further Examples