def make_list(n:Int):[Int]
    tmp := [:Int]
    for i in 1..n
        tmp.insert(i)
    return tmp

say "$(make_list(5))"
fail unless "$(make_list(5))" == "[1, 2, 3, 4, 5]"

def make_string(n:Int):String
    tmp := ""
    for i in 1..n
        tmp += "$i"
    between tmp += ","
    return tmp

say(make_string 5)
fail unless "$(make_string(5))" == "1,2,3,4,5"