You are viewing the version of this documentation from Perl blead.
This is the main development branch of Perl.
(git commit 0a05a8bd231063e1ba6d039754d9e635d47441b5)
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.