![]() ![]() In Boolean algebra, a sum term is a sum of literals. Boolean Addition Recall from part 3 that Boolean addition is equivalent to the OR operation. A literal is a variable or the complement of a variable. The complement of the variable A is read as "not A" or "A bar." Sometimes a prime symbol rather than an overbar is used to denote the complement of a variable for example, B' indicates the complement of B. For example, the complement of the variable A is A. The complement is the inverse of a variable and is indicated by a bar over variable (overbar). Any single variable can have a 1 or a 0 value. A variable is a symbol used to represent a logical quantity. Variable, complement, and literal are terms used in Boolean algebra. ![]()
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