>>-PUSH--+------------+--;------------------------------------->< '-expression-'
PUSH stacks the string resulting from the evaluation of expression LIFO (Last In, First Out) onto the external data queue.
If you do not specify expression, a null string is stacked.
For information on named queues, see the REXX List System LPUSH command, section LPUSH.
Example:
a='Fred'
push /* Puts a null line onto the queue */
push a 2 /* Puts "Fred 2" onto the queue */
The QUEUED built-in function (described on page ***) returns the number of lines currently in the external data queue.