QUEUE appends the string resulting from expression to the tail of the external data queue. That is, it is added FIFO (First In, First Out).>>-QUEUE--+------------+--;------------------------------------>< '-expression-'
If you do not specify expression, a null string is queued.
a='Toft'
queue a 2 /* Enqueues "Toft 2" */
queue /* Enqueues a null line behind the last */
The QUEUED built-in function (described in QUEUED) returns the number of lines currently in the external data queue.