What Is Standard Template Library (STL)?

The C++ standard library is a set of libraries built into the language, and it's great. But what if your needs go beyond what the standard library provides? What if you need to do something more complicated than simple number crunching? The answer is: You write your library! And then it becomes part of the standard library. At least, that's how it works for the template library (STL). The STL lets you build your containers and algorithms and then use them in your code or even contribute them back to the C++ standard library! It's like having an unlimited supply of Legos. STLs (Standard Template Libraries) are a collection of standardized templates that you can use to make your programming life more manageable. They're like a template library for your code, including components such as functors, iterators and algorithm containers. Why would you want a template library? Well, it means that you can create generic functions that will work with any object—so instead of having to write a separate process for each type of object you want to work with, you write one generic function that will work with anything! It is called compile-time polymorphism. It's just fancy speak for "you don't need multiple functions. "Okay, so how do I use them? STLs are included in most programming languages today. If yours doesn't come with one built-in, plenty of third-party libraries are available online or through package managers like pip or npm. 3:STL containers are the bread and butter of programming with C++. There are two kinds of containers: sequence and associative. Sequence containers store objects in a given order, like a vector, a deque, or a list. There are also container adapters and special containers that use other types to implement. An example is a queue, which uses a list as its implementation