A module is a logically isolated part of code that implements a separate concern or feature and contains a collection of conceptually united functions and/or data. Each module occupies a separate compilation unit (i.e. file). The functionality provided by a module is incorporated into another module or the main program by requiring this module or by importing the desired components from it.
| • module structure | Declaring Modules | |
| • scope of visibility | ||
| • import | Require and Import |