what is the use of logic gate?

Answer 1

A logic gate performs a logical operation on one or more logic inputs and produces a single logic output. The logic normally performed is Boolean logic and is most commonly found in digital circuits. Logic gates are primarily implemented electronically using diodes or transistors, but can also be constructed using electromagnetic relays, fluidics, optical or even mechanical elements.

Answer 2

Logic gates are nothing more than on and off switches, and when used appropriately in electronic circuits, they can be used to produce things like computers.