**What Is Enqueue and Dequeue in Data Structure?**

In data structures, __enqueue__ and __dequeue__ are two fundamental operations that are commonly used in queue implementations. A queue is a linear data structure that follows the First-In-First-Out (FIFO) principle, meaning that the element inserted first is the one that will be removed first.

## Enqueue Operation

The enqueue operation adds an element to the back of the queue. It is equivalent to inserting an element at the end of a line. When you enqueue an element, it becomes the last element in the queue.

To enqueue an element, you need to perform the following steps:

- Create a new node or allocate memory for the new element.
- Assign the value to be enqueued to this new node.
- If the queue is empty, set both
**front** and **rear** pointers to point to this new node.
- If the queue is not empty, set the
**next** pointer of the current rear node to point to this new node and update the rear pointer to point to this new node.

## Dequeue Operation

The dequeue operation removes an element from the front of the queue. It is equivalent to removing an element from the front of a line. When you dequeue an element, it is permanently removed from the queue.

To dequeue an element, follow these steps:

- If there are no elements in the queue (i.e., if both front and rear pointers are NULL), display an error message stating that the queue is empty.
- If there is only one element in the queue, set both front and rear pointers to NULL to make the queue empty.
- If there are multiple elements in the queue, store the value of the element at the front of the queue in a temporary variable.
- Move the front pointer to point to the next node (i., update front to point to front->next).
- Release memory for the node that was previously at the front of the queue.

## Summary

The enqueue operation adds an element to the back of a queue, while the dequeue operation removes an element from the front of a queue. These operations are essential for managing and manipulating data in a queue. By understanding how enqueue and dequeue work, you can effectively use queues in various applications such as process scheduling, breadth-first search algorithms, and more.

Remember that queues follow a FIFO order, ensuring that elements are processed in the same order they were inserted. By using enqueue and dequeue operations correctly, you can maintain this order and efficiently manage your data.

### 9 Related Question Answers Found

In data structure, enqueue and dequeue are two fundamental operations that are commonly used in implementing various types of data structures, such as queues and priority queues. These operations allow us to add elements to a data structure (enqueue) or remove elements from it (dequeue). Let’s take a closer look at what enqueue and dequeue mean and how they are used.

When working with data structures, understanding the difference between enqueue and dequeue is fundamental. These two operations are commonly used in various data structures like queues and stacks. Let’s dive deeper into what enqueue and dequeue mean and how they differ from each other.

The concept of enqueue is an essential component in data structures. It refers to the process of adding an element to the end of a queue. In simpler terms, enqueueing means inserting an item into a waiting line, much like waiting in a queue for your turn.

The enqueue operation is an essential concept in data structures. It allows us to add elements to a data structure, specifically a queue, in a specific order. In this article, we will explore what an enqueue operation is and how it functions within the context of data structures.

In the field of data structures, the term “enqueue” refers to the process of adding an element to the end of a queue. A queue is an abstract data type that follows a First-In-First-Out (FIFO) principle, similar to waiting in line at a store or a ticket counter. When you enqueue an element, it means that you are inserting it at the rear or tail end of the queue.

The enqueue operation is a fundamental concept in data structures. It refers to the process of adding an element to the end of a queue. In this article, we will explore what enqueue operation is, how it works, and its significance in various applications.

In data structure, a dequeue (also known as a double-ended queue) is an abstract data type that allows insertion and deletion of elements from both ends. It is similar to a queue, but with the additional flexibility of allowing elements to be added or removed from either end. Types of Dequeue:
There are two main types of dequeue:
1.

A dequeue, also known as a double-ended queue, is a data structure that allows insertion and deletion of elements from both ends. It is similar to a queue and a stack combined, offering the flexibility of adding or removing elements from either end. In this article, we will explore the concept of dequeue in data structures and answer some multiple-choice questions related to it.

In data structures, dequeue (or double-ended queue) is an abstract data type that allows elements to be added or removed from both ends. It is similar to a queue and a stack combined, providing versatility in implementing various algorithms. Operations on Dequeue
A dequeue supports the following operations:
Insertion at Front: Add an element to the front of the dequeue.