# Logical Operations

- Created by: lisamiles
- Created on: 26-11-18 10:11

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- Logical Operations
- NOT
- The NOT logical operator has only one input and one output. The output is the opposite of the input.

- AND
- The AND logical operator has two inputs and one output. The output is 1 only if A and B are both 1.

- OR
- The OR logical operator has two inputs and one output. The output is 1 if either A or B is 1.

- XOR
- The XOR logical operator has two inputs and one output. The output is 1 only if A and B are different.

- Laws of Boolean Algebra
- Annulment Law
- Identity Law
- Idempotent Law
- Complement Law
- Commutative Law
- Double Complement Law
- Distributive Law
- Absorptive law
- Associative Law

- Boolean notation
- • a bar on top of and input variable represents the NOT operator. NOT A = ?
- • a dot “.” represents the AND function. A and B = A.B
- a plus sign “+” represents the OR function. A or B = A + B
- a plus sign with a circle represents the XOR function. A exclusive or B = ?????????????????

- NOT

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