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
eg) or as A' . In the C programming language, it is !A and in digital circuit design, /A. (1995-01-24)