What is the ALU in the processor?

An arithmetic$-$logic unit $($ALU$)$ is the part of a computer processor $($CPU$)$ that carries out arithmetic and logic operations on the operands in assembly language instruction.

An arithmetic$-$logic unit $($ALU$)$ is the part of a computer processor $($CPU$)$ that carries out arithmetic and logic operations on the operands in computer instruction words.

The Analogic logical Unit $($ALU$)$ the part of the microprocessor that carries out all the analog operations on the operands in computer instruction words.

An arithmetic$-$logic unit $($ALU$)$ is the part of the personal computer $($PCU$)$ that carries out operations on desktop.