Which part of the computer performs arithmetic calculations?

The ALU is a key part of the CPU (Central Processing Unit), and it is directly responsible for performing all arithmetic operations such as addition, subtraction, multiplication, and division. It also handles logical operations like comparing numbers, checking conditions (like greater than or less than), and making decisions based on those comparisons.

When a user performs any task that involves numbers—like calculations in spreadsheets or running a program that uses math—the ALU is the part of the computer that carries out those tasks. It receives the data from memory or registers, performs the necessary calculations, and then sends the result back for further processing or storage.