Input[ ] interactively reads in one Mathematica expression.
Input["prompt"] requests input, using the specified string as a prompt.
Input returns the expression it read.
The operation of Input may vary from one computer system to another. When a Mathematica front end is used, Input may work through a dialog box.
When no front end is used, Input reads from standard input.
If the standard input is a file, then Input returns EndOfFile if you try to read past the end of the file.
On most systems, Input[ ] uses ? as a prompt.
When Input is evaluated, Mathematica stops until the input has been read.
See Section 2.9.20.
See also: InputString, Read, Get, Dialog, ButtonBox.
New in Version 1.