## BOOLEAN ALGEBRA

Digital circuits operate with two binary digits, 0 and 1. These logic circuits perform various arithmetic operations on the given inputs. Boolean, a mathematician, proposed an algebra that can be used to express these logic functions called the Boolean algebra. It comprises of a set of rules and theorems that governs the operation of the logic gates. As in case of algebra, alphabets are used to denote variables.

##### FUNDAMENTAL SYMBOLS—BOOLEAN ALGEBRA

There are four connecting symbols used in Boolean algebra.

- Equal sign (=)
- Multiplication sign (·)
- Plus sign (+)
- Inversion sign (‘) or (-)

**Equal sign:**This refers to the sign of equality as in mathematics. The logical value on one side is the same as the logical value on the other ...

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