INBooleaN 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)