You are viewing the version of this documentation from Perl blead. This is the main development branch of Perl. (git commit 7550d0c6e95d9645f94db47f1829bafd8a4c3dd9)
HANDLE->format_name(EXPR)
$FORMAT_NAME
$~

The name of the current report format for the currently selected output channel. The default format name is the same as the filehandle name. For example, the default format name for the STDOUT filehandle is just STDOUT.

Mnemonic: brother to $^.