Not

Usage

• !expr is the logical NOT function. It gives False if expr is True, and True if it is False.

Notes

• Not[expr] can be input in StandardForm and InputForm as

expr. The character

can be entered as

not

or \[Not].

• Not gives symbolic results when necessary, applying various simplification rules to them.

• If you are using Mathematica with a text-based front end, then you cannot use the notation !expr for Not[expr] if it appears at the very beginning of a line. In this case, !expr is interpreted as a shell escape.

• See Section 1.5.6.

• See also: LogicalExpand, BitNot, Nand, Nor.

• New in Version 1; modified in 3.

Further Examples