Elon for

$
  Besides lists, Elon has
  no real control structures.
  This creates a Symbol which
  runs a BASIC style for.
  ITERATIVE ONLY.
  STACK ARGS:
   -step count
   -end index
   -start index
   -routine list
$
{
  $ claim args $
  "c-step" define
  "c-end" define
  "c-start" define
  "routine" define

  c-start "counter" define
  set
    routine
    counter c-step add "counter" define
    counter c-end less { repeat } do
  forget

  "c-step" undefine
  "c-end" undefine
  "c-start" undefine
  "routine" undefine
  "counter" undefine
} "for" define

$ example usage $
{
  counter print
} 0 10 1 for