C++ plays quite an integral role in modern times as many contemporary systems such as operating systems, web browsers, databases, etc. have C++ code in at least some part of their codebase. Moreover, C++ is quite useful in performance critical areas because of its speed. C++ is used by some 4.4 million developers worldwide. This language is used for games, operating systems, autonomous cars as well as medical technology. Some of the biggest brands like Google and Facebook also make use of this programming language. Programs developed in C++ can be moved from one platform to another. This is one of the main reasons that applications requiring multi-platform or multi-device development often use C++.