Question

what is computer and what is its perform

Answer 1

a computer is an electronic machine which is used to store and deal with large amount

Answer 2

A computer is a machine (mostly electronic) that is able to take information (input), and process it to make new information (output).

The computer does its primary work in a part of the machine we cannot see, a control center that converts data input to information output. This control center, called the central processing unit (CPU), is a highly complex, extensive set of electronic circuitry that executes stored program instructions.