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).
(See Chapter 14, Input and Output Streams
for a discussion of Rexx input and output.)
If you do not specify expression,
a null string is queued.
Example 2.30. Instructions — QUEUE
a="Toft"queuea2/* Enqueues "Toft 2" */queue/* Enqueues a null line behind the last */
The QUEUED built-in
function returns the number
of lines currently in the external data queue.
