But it's interesting, since I hadn't seen that part yet, only the loop part and some of the dynamic typing.

  for List:
    each i: [1, 2]
    each j: ["a", "b", "c"]
    [i, j]

  > [[1, "a"], [1, "b"], [1, "c"], [2, "a"], [2, "b"], [2, "c"]]

  for (i: 1..4):
    "number " +& i
    ~into List

  > ["number 1", "number 2", "number 3"]

  for:
    each:
      friend: ["Alice", "Bob", "Carol"]
      index: 1..4
    println(index +& ". " +& friend)
  1. Alice
  2. Bob
  3. Carol