if (1 && 2) "ok1"
if (0 && 2) "nok2" else "ok2"
if (3 && 0) "nok3" else "ok3"
if (0 && 0) "nok4" else "ok4"
if (0 && 0 && 0) "nok5" else "ok5"
if (0 && 1 && 0) "nok6" else "ok6"
if (1 && 1 && 1) "ok7" else "nok7"
print "\n"
define f() {
	"f"
}
define g() {
	"g"
	return 1
}
if (f() && g()) {
	"nok8"
} else "ok8"
if (!f() && g()) {
	"ok9"
} else "nok9"
print "\n"
if (1 < 2 && 3 < 4) "ok10" else "nok10"
print "\n"