GUI Button - function to stop executing the remaining script

[blakestone]

To jump out of LOOP you enter EXIT eg.

(
  local a = true

  for x = 1 to 1 do (
    if (a == true) then exit
  )
)

I am not sure how to jump out of a GUI Button Function eg.

(
  local a = true

  function my_function = (
    if (a == true) then exitfunction ???
  )
)

or

(
  local a = true

  on my_button pressed do (
    if (a == true) then exitmy_button ???
  )
)

[blakestone]

ah... got it!

  return() -- this works
  return   -- this doesn't and what i had previously tried *slap forehead*

[Steve_Curley]

Not related directly with original question (exiting an on...do) - all functions in Maxscript which take no parameters must be called with empty parentheses.
gc()
clearListener()
etc etc.