C++ is a high-level, general-purpose programming language that is an extension of the C programming language. It is a compiled language, meaning that it is converted into machine code by a compiler before it can be executed. C++ is known for its efficiency, performance, and flexibility, and is widely used in the development of operating systems, system software, device drivers, game engines, and other performance-critical applications. C++ supports multiple programming paradigms, including object-oriented, generic, and procedural programming, and provides a comprehensive set of features, such as templates, operator overloading, and memory management, that enable developers to create complex and efficient programs. C++ also has a large and active community of developers, which has contributed a vast ecosystem of libraries, frameworks, and tools to the language, making it easy to extend its capabilities and integrate it with other systems. With its power, performance, and flexibility, C++ has become one of the most popular programming languages for a wide range of applications.