GIc> 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)