You are viewing the version of this documentation from Perl blead.
This is the main development branch of Perl.
(git commit 5355a72c746fa5146541d790aece53b22737afee)
The special filehandle that points to the currently open output file when doing edit-in-place processing with -i. Useful when you have to do a lot of inserting and don't want to keep modifying $_. See perlrun for the -i switch.