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Computers represent numbers and information as 0s and 1s. The circuits that perform control and arithmetic operations are called logic circuits.There are three types of logic circuits, and all calculations can be performed by combining these three types of circuits.
AND circuits are circuits with two inputs and one output, and the output signal becomes 1 only when the two input signals are 1.
An OR circuit is a circuit with two inputs, A and B, and one output. This circuit can output 1 if either A or B are 1.
A NOT circuit is a circuit with one input and one output. This circuit outputs 1 when 0 is the input and 0 when 1 is the input.