You are viewing the version of this documentation from Perl blead. This is the main development branch of Perl. (git commit f1e500f688f116c47f2aee6ae0f6b7c6be8e4e17)
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 $^.