From simple calculations to full publishable documents and sophisticated dynamic interfaces, everything you can do with the Wolfram System's standard interactive interface is done in a notebook. Carefully designed to leverage familiar word-processing metaphors, Wolfram System notebooks are uniquely powerful computational documents that support live computation, arbitrary dynamic interfaces, full typeset input, image input, automatic code annotation, a complete high-level programmatic interface, and in all, thousands of carefully organized functions and options.
— do a computation
— choose how to enter input (Wolfram Language, free-form, text, etc.)
( at beginning of input) — use free-form linguistics to generate Wolfram System output