+
-
*
/
%
++
--
+=
-=
*=
/=
%=
==
!=
<
>
<=
>=
{print $1}
$2 == "foo"
$2 != "foo"
"foo" in array
/regex/
!/regex/
$1 ~ /regex/
$1 !~ /regex/
($2 <= 4 || $3 < 20)
($1 == 4 && $3 < 20)
