Functions and Namespaces

Namespace of the functions

Every function has a containing namespace. Functions in an undeclared namespace (functions not declared within the scope of an explicit package statement) exist in the main namespace. We may also declare a function within another namespace by prefixing its name:

sub Extensions::Math::add { ... }

This will create the namespace as necessary and then declare its function within it. Remember that Perl packages are open for modification at any point, even while our program is running. Perl will issue a warning if we declare multiple functions with the same name in a single ...