usually works by taking whatever input you give, and then processing it. Sometimes, however, you may want to have a program you write explicitly request more input. You can do this using Input
Exactly how Input
work depends on the computer system and Mathematica
interface you are using. With a text-based interface, they typically just wait for standard input, terminated with a newline. With a notebook interface, however, they typically get the front end to put up a "dialog box", in which the user can enter input.
In general, Input
is intended for reading complete Mathematica
, on the other hand, is for reading arbitrary strings.