This point is important, so please pay close attention: With every Perl installation, you receive a full copy of the current documentation for the Perl language and the interpreter.
That's right. The entire set of documentation available for Perl comes with the installation bundle. You get it for free. The 5.8 distribution includes more than 1,700 pages of documentation. This documentation includes reference material, tutorials, FAQs, history, and even notes on Perl's internals.
You can access this documentation using a variety of methods. On Windows and Unix, a utility called perldoc is installed with Perl. You can use the perldoc program to search the documentation and provide formatted output for the manuals. To run perldoc