Explore the full potential of C++ by mastering the standard library.

Become a C++ Programmer

The C++ standard library is a collection of all the tools and utilities available in C++. It received its latest update in 2017, known as C++17. The update introduces many new features that further optimize our code. This module will help us fully grasp C++ and use it to its full potential.

C++ Standard Library

The [std::queue](http://en.cppreference.com/w/cpp/container/queue) follows the FIFO principle (**F**irst **I**n **F**irst **O**ut). The queue `que`, which needs the header `<queue>`, has four special methods. 

With `que.push(e)` you can insert an element `e` at the end of the queue and remove the first element from the queue with `que.pop()`. `que.back()` enables you to refer to the last element in the `que`, `que.front()` to the first element in the `que`. `std::queue` has similar characteristics as [`std::stack`](https://www.educative.io/courses/cpp-standard-library-including-cpp-14-and-cpp-17/stack). So you can compare `std::queue` instances and get their sizes. The operations of the queue have constant complexity.

A queue follows the opposite principle of stack. It is a very powerful data structure in its own right.

The Standard Library

Overview

Application of Libraries

Useful Functions

Adaptors for Functions

Pairs and Tuples

Reference Wrappers

Smart Pointers

Type Traits

Time Library

std::any, std::optional, and std::variant

Containers in General

Sequential Containers

Associative Containers in General

Ordered Associative Containers

Unordered Associative Containers

Adaptors for Containers

Iterators

Callable Units

Algorithms

Non-Modifying Algorithms

Modifying Algorithms

More Algorithms

New Algorithms with C++17

Numeric

Strings

String View

Regular Expressions

Input and Output Streams

Conclusion

Queue