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based on an earlier version of the Wolfram Language.
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Reverse

Reverse[expr]
reverses the order of the elements in expr.
Reverse[expr, n]
reverses elements at level n in expr.
Reverse[expr, {n1, n2, ...}]
reverses elements at levels n1, n2, ... in expr.
  • Reverse works on SparseArray objects, reversing the elements in the corresponding ordinary array.
  • For a matrix m, Reverse[m] reverses the order of the rows, and Reverse[m, 2] reverses the order of the columns.
Reverse works with heads other than List:
Reverse sublists:
Reverse operands:
Turn an array plot upside down:
Reverse is its own inverse:
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