title: ?EXIT
description:
  ?EXIT     "question-exit"
  ( true -- ) ( I: ra ip -- ra )
  ( false -- ) ( I: ra ip -- ra ip )

  If the value at the stack top is non-zero, perform EXIT.

  ?EXIT is quivalent to IF EXIT THEN . Very common.

notation-note:
  "I:" is the interpretation stack label, the interpretation stack
  is he return stack plus the interpretation pointer (IP) on top.

  For example, EXIT may be described by the following diagram:

  EXIT ( I: ra ip -- ra ) \ remove the top interpretation stack item

page-written-by:
  mlg