You are viewing the version of this documentation from Perl blead. This is the main development branch of Perl. (git commit 04ac2edde8bd88a72f6d3ebbd973529d194ccf5d)
HANDLE->format_lines_left(EXPR)
$FORMAT_LINES_LEFT
$-

The number of lines left on the page of the currently selected output channel.

Mnemonic: lines_on_page - lines_printed.