Implementation of queue: We can implement the queue through the array and linked list. An array is the easiest way to implement the queue.

When a queue is created with the help of an array, the number of its elements is declared before processing. The beginning of the array becomes its “front” end, and the end of the array becomes its “rear” end. The terms “front” and “rear” are used to describe the linear list when implemented as a queue.

The “Front” stores the index of the first element in the queue. The “rear” stores the index of the last element in the queue. At any given time, the number of elements in a queue can be calculated from the values ​​of “front” and “rear”.

Enqueue operation

When you insert an element in the queue, that operation is called enqueue.

Algorithm of insert the element of the queue

Insertion in a queue implemented as an array

Dequeue operation

When you remove an element from the queue, that operation is called dequeue.

Algorithm of insert the element of the queue

Deletion in a queue implemented as an array

Queue program in C language:

 Output:

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