What is the role of the CPU in a computer?

The role of the CPU, or Central Processing Unit, in a computer is primarily to execute instructions from programs. The CPU acts as the brain of the computer, processing data and performing calculations to carry out the tasks defined by software. It interprets and executes commands from both the operating system and the applications, making it essential for the operation of any computer system.

The execution of instructions involves fetching data from memory, performing operations (such as arithmetic calculations or logic decisions), and storing results back in memory. This central processing capability allows the CPU to manage all the computational tasks of the computer, making it crucial for any applications that run on the system.

In contrast, storing data permanently is a function of storage devices like hard drives and SSDs. Managing system power typically involves components such as the power supply and motherboard circuitry, not the CPU itself. Finally, displaying graphics is primarily handled by the GPU (Graphics Processing Unit) or integrated graphics systems, rather than the CPU directly. Thus, the CPU's fundamental role is indeed to execute instructions from programs, making it a core element of computer functionality.