You are viewing the version of this documentation from Perl blead. This is the main development branch of Perl. (git commit b3138094d90d9a1861f0e10af33500f7d508e29c)
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.