-- main.mcl --
import "fmt"

# test a function with part of the expression scoped from outside
$c1 = 42 # put this after to confirm any-order rules
$constmult = func($x) {
	$c1 * $x * $c2
}
$c2 = 37 # put this after to confirm any-order rules

$num = 13
$out = $constmult($num) # 20202

test [fmt.printf("%d * %d * %d is %d", $c1, $num, $c2, $out),] {}
-- OUTPUT --
Vertex: test[42 * 13 * 37 is 20202]