dequeue
DEQUEUE queuename (library procedure)
outputs the least recently QUEUEd member of the queue that is the
value of the variable whose name is "queuename" and removes that
member from the queue.
DEQUEUE queuename (library procedure)
outputs the least recently QUEUEd member of the queue that is the
value of the variable whose name is "queuename" and removes that
member from the queue.