You are viewing the version of this documentation from Perl blead. This is the main development branch of Perl. (git commit 2f637913fcd4a6d00e9bc1f76ec08ae55eb3318f)
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.