Arithmetic Logic Unit (ALU) is a sun unit within a computer’s central processing unit. ALU full form is Arithmetic Logic Unit , takes the data from Memory registers; ALU contains the logical circuit to perform mathematical operations like subtraction, addition, multiplication, division, logical operations and logical shifts on the values held in the processors registers or its accumulator.
It is the size of the word that the ALU can handle which, more than any other measure, determines the word-size of a processor: that is, a 32-bit processor is one with a 32-bit ALU.
After processing the instructions the result will store in Accumulator. Control unit generates control signals to ALU to perform specific operations. The accumulator is used as by default register for storing data. It is 16-bit register.
