What main function does the CPU serve in a computer system?

The main function of the CPU (Central Processing Unit) in a computer system is to perform data processing. The CPU acts as the brain of the computer, executing instructions from programs and carrying out calculations and decision-making processes. It interprets commands and processes data received from various inputs, enabling the computer to perform tasks and run applications. This processing capability is essential for the overall operation of the computer, making the CPU a crucial component in executing software and managing tasks efficiently.

In contrast, providing electrical power is not a function performed by the CPU; rather, it is managed by the power supply unit. Storing large amounts of data is primarily the responsibility of memory components such as RAM and hard drives, while connecting to peripheral devices is typically handled by ports and controllers on the motherboard, which the CPU can communicate with but does not directly manage.