?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