RosettaCodeData/Task/Queue-Usage/J/queue-usage-1.j

   queue=: conew 'fifo'
   isEmpty__queue ''
1
   push__queue 9
9
   push__queue 8
8
   push__queue 7
7
   isEmpty__queue ''
0
   pop__queue ''
9
   pop__queue ''
8
   pop__queue ''
7
   isEmpty__queue ''
1