A queue is also a list of elements with insertions permitted at one end—called the rear, and deletions permitted from the other end—called the front. This means that the removal of elements from a queue is possible in the same order in which the insertion of elements is made into the queue. Thus, a queue data structure exhibits the FIFO (first in first out) property. insert and delete are the operations that are provided for insertion of elements into the queue and the removal of elements from the queue, respectively. Shown in following Figure are the effects of insert and delete operations on the queue.


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