Minimalistic FizzBuzz in Pony lang

fizzbuzz.pony

use "collections"

actor Main
  new create(env: Env) =>
    try
      let n = env.args(1).i32()
      for i in Range[I32](1, n) do
        env.out.print(fizzbuzz(i))
      end
    end

  fun fizzbuzz(n: I32): String =>
    if (n % 15) == 0 then
      "FizzBuzz"
    elseif (n % 5) == 0 then
      "Buzz"
    elseif (n % 3) == 0 then
      "Fizz"
    else
      n.string()
    end