What is the function of the CPU in a computer system?

The CPU, or Central Processing Unit, serves as the core component of a computer system responsible for interpreting and executing program instructions. It acts as the brain of the computer, processing data and performing calculations that enable software to run and carry out tasks. This function is critical because every operation, from simple calculations to complex program executions, hinges on the CPU's ability to process instructions efficiently.

The CPU retrieves instructions from memory, decodes them to understand what action is required, and then executes those actions, managing the flow of information between different parts of the computer, such as memory and input/output devices. This makes the CPU fundamental to the operation of the entire system, as it ensures that programs run effectively and efficiently. Its role in interpreting and executing program instructions is what distinguishes it from other components in a computer.