What is Processor? || Why we need processor?

Processor :
Processor is the single chip or multiple circuit boards in the computer.

Processor is also called the Brain of the computer. The processor for personal computer is also called the "microprocessor".

E.g. When user enter some mathematics calculation who calculate the result? Who control which operation is to be perform? It's a "processor".

Processor has two parts :

1) Control Unit :
2) Arithmetic Logic Unit :

Control Unit (CU) is work like a traffic cop in the processor.Its work is to communicate with Input/ Output Devices, ALU etc. It's manage the operation.

Arithmetic Logic Unit (ALU) work like a calculator in a computer. It's work is to perform the mathematics calculation. Operations like Addition, Subtraction, Multiplication, Comparison etc.

Processor also has the small amount of memory called "Registers". Registers are the small and fast memory. It is use to store the address of instruction, result of instruction etc.