![]() ![]() Thus, this particular type of queue is considered the best version of a queue data structure. What is Circular Queue in a Data Structure?Ī circular queue is an extended version of a linear queue as it follows the First In First Out principle with the exception that it connects the last node of a queue to its first by forming a circular link. Hence, it is also called a Ring Buffer.Īs shown in the illustration above, the circular queue resolves the memory wastage problem with the help of a circular link. enQueue(value) - Used to insert a new value in the Circular Queue.Rear - Used to get the end element of the Circular Queue.Front - Used to get the starting element of the Circular Queue.The Circular Queue is similar to a Linear Queue in the sense that it follows the FIFO (First In First Out) principle but differs in the fact that the last position is connected to the first position, replicating a circle. deQueue() - Used to delete a value from the Circular Queue.This operation takes place from the end of the Queue. Representation of Circular Queue using Arrays and a Linked List This operation takes place from the front of the Queue. You can implement the circular queue using both the 1-D array and the Linked list. However, implementing a circular link is a new addition that you need to execute. Additionally, this queue works by the process of circular incrementation. That is, when you reach the end of a queue, you start from the beginning of a queue. The circular incrementation is achievable with the help of the modulo division. ![]() Now you will understand how you can achieve circular incrementation, with the help of an example. Let’s say the MaxSize of your queue is 5, and the rear pointer has already reached the end of a queue. ![]()
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