How to Dequeue an Element from a Queue in C++? Last Updated : 29 Feb, 2024 Comments Improve Suggest changes Like Article Like Report In C++, queues are a type of container adaptors that operate in a first in first out (FIFO) type of arrangement. Elements are inserted at the back (end) and are deleted from the front. In this article, we will learn how to dequeue an element from a queue in C++ STL. Example: Input: Create a queue and enqueue the values {1, 2, 3, 4, 5}.Output: Queue after dequeue: {2, 3, 4, 5}, after dequeue the first element.Dequeuing an Element from a Queue in C++To dequeue an element from a queue in C++, we can use the std::queue::pop() function. This function deletes or dequeues the first element of the queue. C++ Program to Dequeue an Element from a Queue C++ // C++ Program to illustrate how to dequeue an element from // a queue #include <iostream> #include <queue> using namespace std; // Driver Code int main() { // Creating a queue of integers queue<int> q; // Enqueueing elements into the queue for (int i = 1; i <= 5; ++i) { q.push(i); } // Dequeueing an element from the queue q.pop(); // Displaying the queue elements while (!q.empty()) { cout << q.front() << " "; q.pop(); } cout << endl; return 0; } Output2 3 4 5 Time Complexity: O(1) Space Complexity: O(1) Comment More infoAdvertise with us Next Article How to Dequeue an Element from a Queue in C++? R rohitpant4532 Follow Improve Article Tags : C++ Programs C++ STL cpp-deque CPP Examples +1 More Practice Tags : CPPSTL Similar Reads C++ Programming Language C++ is a computer programming language developed by Bjarne Stroustrup as an extension of the C language. It is known for is fast speed, low level memory management and is often taught as first programming language. It provides:Hands-on application of different programming concepts.Similar syntax to 5 min read Non-linear Components In electrical circuits, Non-linear Components are electronic devices that need an external power source to operate actively. Non-Linear Components are those that are changed with respect to the voltage and current. Elements that do not follow ohm's law are called Non-linear Components. Non-linear Co 11 min read Object Oriented Programming in C++ Object Oriented Programming - As the name suggests uses objects in programming. Object-oriented programming aims to implement real-world entities like inheritance, hiding, polymorphism, etc. in programming. The main aim of OOP is to bind together the data and the functions that operate on them so th 5 min read Spring Boot Tutorial Spring Boot is a Java framework that makes it easier to create and run Java applications. It simplifies the configuration and setup process, allowing developers to focus more on writing code for their applications. This Spring Boot Tutorial is a comprehensive guide that covers both basic and advance 10 min read Class Diagram | Unified Modeling Language (UML) A UML class diagram is a visual tool that represents the structure of a system by showing its classes, attributes, methods, and the relationships between them. It helps everyone involved in a projectâlike developers and designersâunderstand how the system is organized and how its components interact 12 min read Steady State Response In this article, we are going to discuss the steady-state response. We will see what is steady state response in Time domain analysis. We will then discuss some of the standard test signals used in finding the response of a response. We also discuss the first-order response for different signals. We 9 min read Backpropagation in Neural Network Back Propagation is also known as "Backward Propagation of Errors" is a method used to train neural network . Its goal is to reduce the difference between the modelâs predicted output and the actual output by adjusting the weights and biases in the network.It works iteratively to adjust weights and 9 min read Inheritance in C++ The capability of a class to derive properties and characteristics from another class is called Inheritance. Inheritance is one of the most important features of Object-Oriented Programming in C++. In this article, we will learn about inheritance in C++, its modes and types along with the informatio 10 min read Polymorphism in Java Polymorphism in Java is one of the core concepts in object-oriented programming (OOP) that allows objects to behave differently based on their specific class type. The word polymorphism means having many forms, and it comes from the Greek words poly (many) and morph (forms), this means one entity ca 7 min read 3-Phase Inverter An inverter is a fundamental electrical device designed primarily for the conversion of direct current into alternating current . This versatile device , also known as a variable frequency drive , plays a vital role in a wide range of applications , including variable frequency drives and high power 13 min read Like