subroutine exit造句

When subroutines are invoked, execution begins at the start, and once a subroutine exits, it is finished; an instance of a subroutine only returns once, and does not hold state between invocations.
Arrays are passed by reference, and this mechanism is an advertised feature of the language to pass data back out of a subroutine in contrast, array slices are copied before being passed, so that data modifications do not flow back into array ranges ( after the subroutine exits ), violating the principle of least surprise.
It's difficult to find subroutine exit in a sentence. 用subroutine exit造句挺难的