What is the primary function of a CPU?

The primary function of a CPU (Central Processing Unit) is to fetch, decode, and execute instructions. This process is fundamental to how computers operate. The CPU is often referred to as the "brain" of the computer because it performs calculations and executes commands essential for running software and managing hardware operations.

When a program is run, the CPU retrieves instructions from the memory, decodes them to understand the required operation, and then executes the instructions to perform tasks. This cycle of fetching, decoding, and executing is critical for processing information, managing tasks, and running applications effectively.

While other components of a computer are responsible for storing data, inputting it, and outputting results, the CPU's primary role is to manipulate and process that data by executing programmed instructions. Understanding this function highlights the CPU's central role in computing and how it facilitates the operation of all other components.