\ Fibonacci numbers (recursive)
\+ stdlib
fibo (n):
  ? n < 2
    :> n
  :> (fibo n - 1) + fibo n - 2  \ not: fibo(n-1) + fibo(n-2) == fibo (n - 1 + fibo (n-2)

main (parms):+
    lim =: string parms[1] as integer else 30
    ?# i =: from 1 upto lim
      print i, fibo i