8.1 How to use modules
A module is a bunch of functions, programs or other modules collected in
one symbol. For instance, the module Stdio contains the objects
stdin, stdout and stderr. To access these objects
you can write Stdio.stdin, Stdio.stdout or
Stdio.stderr anywhere in your program where an object of that type
is acceptable. If you use Stdio a lot you can put
import Stdio; in the beginning of your program. This will import
all the identifiers from the module Stdio into your program, making it
possible to write just stdin instead of Stdio.stdin.
It is also possible to import all modules in a directory with import
by putting the directory name in doublequtes. So, to import all modules in
the current directory, you would use import ".";.