What are the functions of the Arithmetic logic Unit (ALU)?

Arithmetic Logic Unit | ALU Definition, Function & Operation

Arithmetic Logic Unit | What Is Arithmetic And Logic Unit ? | ALU

2 bit ALU circuit diagram - Gadgetronicx

Design a two-bit arithmetic logic unit (ALU) that has the following operations:i) Add the operand togetherii) AND the operand togetheriii) OR the operand togetheriv) XOR the operand together