You are viewing the version of this documentation from Perl blead.
This is the main development branch of Perl.
(git commit d6f09a896842e5288af5d3817756b67a919ad7ad)
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.