Extracts elements from an expression that match a pattern.
Cases with Except pattern
Cases with Alternatives
Cases with level specification
Cases[{a, b, a}, a]
→ {a, a}Cases[{1, 2, 3, 4, 5}, Except[3]]
→ {1, 2, 4, 5}Cases[{1, 2, 3, 4, 5}, Except[2 | 4]]
→ {1, 3, 5}Cases[{{1, 2}, {3, 4}}, _Integer, {2}]
→ {1, 2, 3, 4}