Usually imports subroutines and variables from module into the current package. import is not a built-in, but an ordinary class method that may be inherited from UNIVERSAL.

At compile time, requires the module and calls its unimport method on list. See use on the next page.

Designates the block as a package with a namespace. Without block, applies to the remainder of the current block or file. Sets package variable $VERSION to version, if specified.

Requires Perl to be at least this version. version can be numeric like 5.005 or 5.008001, or a v-string like v5.8.1.

If expr is numeric, behaves like require version. Otherwise expr must be the name of a file that is included from the Perl library. Does not include more than once, and yields a fatal error if the file does not evaluate to true. If expr is a bare word, assumes extension .pm for the name of the file.

Usually cancels the effects of a previous import or use. Like import, unimport is not a built-in, but an ordinary class method.

See the section Pragmatic Modules below.

By convention, pragma names start with a lowercase letter.

At compile time, requires the module, optionally verifies the version, and calls its import method on list.

If list is (), doesn’t call import.

Normally used to import a list of variables and subroutines from the named module into the current package.

Module names start with an uppercase letter.