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What are perl4 and perl5?by faq_monk (Initiate)
|on Oct 08, 1999 at 00:15 UTC||Need Help??|
Current Perl documentation can be found at perldoc.perl.org.
Here is our local, out-dated (pre-5.6) version:
Perl4 and perl5 are informal names for different versions of the Perl programming language. It's easier to say ``perl5'' than it is to say ``the
The 5.0 release is, essentially, a complete rewrite of the perl source code from the ground up. It has been modularized, object-oriented, tweaked, trimmed, and optimized until it almost doesn't look like the old code. However, the interface is mostly the same, and compatibility with previous releases is very high.
To avoid the ``what language is perl5?'' confusion, some people prefer to simply use ``perl'' to refer to the latest version of perl and avoid using ``perl5'' altogether. It's not really that big a deal, though.
See the perlhist manpage for a history of Perl revisions.