< logic > In Boolean algebra , the logical complement or negation of a Boolean value is the opposite value, given by the following truth table :
A | -A --+--- T | F F | T
-A is also written as A with a bar over it or with a small vertical line hanging from the right-hand end of the "-" ( LaTeX \neg) or as A'. In the C programming language, it is !A and in digital circuit design, /A.
(1995-01-24)