loop 1..5 'num [
    when.has: num [
        [< 2]   -> print [num ": it's less than 2"]
        [= 2]   -> print [num ": it's 2!"]
        [= 3]   -> print [num ": it's 3!"]
        true    -> print [num ": the number is too big"]
    ]
]