What is logic of arithmetic?

In computing, an arithmetic logic unit (ALU) is a combinational digital circuit that performs arithmetic and bitwise operations on integer binary numbers. This is in contrast to a floating-point unit (FPU), which operates on floating point numbers.

Is arithmetic a logic unit?

The arithmetic-logic unit (ALU) is that functional part of the digital computer that carries out arithmetic and logic operations on machine words that represent operands. ... In many CPUs, separate units exist for arithmetic operations (the arithmetic unit, AU) and for logic operations (the logic unit, LU).