Arithmetic Logic Unit ALU

The Arithmetic Logic Unit carries out as the name suggests Arithmetic and Logical operations on the data made available to it. Basic Arithmetic functions which an ALU can carry out are an addition and subtraction. More powerful CPU's can support additional mathematical operations like multiplication and division. THe logical operation which can it can carry out greater than, equal to, less than comparision between two numbers. Besides these operations some processors also supports operations which check if particular bits are on or off.