plainOldText

  let ageFails = (200 + 2).Age
  Error: 202 can't be converted to Age

  import std/strutils

  stdout.write("What's your age: ")
  let age = stdin.readLine().parseInt().Age

  $ nim r main.nim
  What's your age: 999
  Error: unhandled exception: value out of range: 999 notin 0 .. 200 [RangeDefect]

  type
    Age = range[0..200]

  let ageWorks = 200.Age
  let ageFails = 201.Age

  $ nim c main.nim
  Error: 201 can't be converted to Age

  Map.put(map, key, value)
  Map.get(map, key)
  Map.get(map, key, default)
  Map.del(map, key)

  Map.put(key, value, map)
  Map.get(key, map)
  Map.get(key, default, map)
  Map.del(key, map)

  map
  |> Map.put(key, value)
  |> Map.get(key)