What is logo(急）

Logo is a functional programming language. It is an easier to read adaptation and dialect of the Lisp programming language; some have called it Lisp without the parentheses. It was created for educational use, more so for constructivist teaching, by Daniel G. Bobrow, Wally Feurzeig and Seymour Papert. Today, it is known mainly for its "turtle graphics", but it also has significant facilities for handling lists, files, and I/O. Logo can be used to teach most computer science concepts, as UC Berkeley Lecturer Brian Harvey does in his "Computer Science Logo Style" trilogy.

A logo (from the Greek λογότυπος = logotipos) is a graphic element, symbol, or icon of a trademark or brand and together with its logotype, which is set in a unique typeface or arranged in a particular way. A typical logo is designed to cause immediate recognition by the viewer. The logo is one aspect of the brand of a company or economic entity, and the shapes, colors, fonts and images are usually different from others in a similar market. Logos may also be used to identify organizations or other entities in non-economic contexts.