3. Perl Modules

Perl modules are namespaces that contain function and variables. Two distinct modules may each contain a function (or a variable) with the same name, yet the perl interpreter will be able to tell them apart. Furthermore, both functions can be invoked from the same code.

• 3.1. Declaring a Package
  • 3.1.1. Where to find a module
• 3.2. Loading Modules and Importing their Functions
  • 3.2.1. Accessing Functions from a Different Module
  • 3.2.2. Exporting and Importing Functions
  • 3.2.3. Using Variables from a Different Namespace
• 3.3. BEGIN and END
• 3.4. The "main" Namespace
• 3.5. Difference between Namespaces and Modules