Just like print, but implicitly appends a newline.  say LIST
 is
simply an abbreviation for { local $\ = "\n"; print LIST }
.  To use
FILEHANDLE without a LIST to print the contents of $_
 to it, you must
use a real filehandle like FH
, not an indirect one like $fh
.
This keyword is available only when the "say"
 feature
is enabled, or when prefixed with CORE::
; see
feature.  Alternately, include a use v5.10
 or later to the current
scope.