What is the main function of a central processing unit (CPU)?

The main function of a central processing unit (CPU) is to process instructions given to a PC. The CPU is often referred to as the brain of the computer, as it performs the calculations and logical operations necessary to execute programs and perform tasks. It interprets and executes instructions from software, carries out arithmetic and logical operations, and manages the flow of information between the computer’s various components.

The CPU’s ability to perform these tasks is essential for the overall functionality of a computer system. By executing the instructions from the operating system and applications, the CPU ensures that the system performs operations such as calculations, data movement, and control of peripheral devices.

This core function distinguishes the CPU from other components, as it does not store data permanently, manage hardware devices directly, or create user accounts. Each of those tasks is typically handled by other parts of the computer system or software designed for specific functions.