What is computer explain with block diagram?

A computer is a machine that processes data. A block diagram shows this simple flow. You use Input devices, like a keyboard, to give it information. The Central Processing Unit (CPU) acts as the brain. It processes the data with help from Memory (RAM). Finally, Output devices, like your monitor, show you the result. At its core, every computer follows this basic Input -> Process -> Output cycle. It's a fundamental flow for all computing.