Qt is a cross-platform application development framework for writing software that can run on numerous platforms as a native application without changing much code, with native platform capabilities and speed. Aside from GUI applications, we can also write console or command-line applications using the framework—but the primary use cases are graphical user interfaces.
Although applications using Qt are usually written in C++, QML bindings to other languages also exist. Qt simplifies many aspects of C++ development, using comprehensive and powerful APIs and tools. Qt supports many compiler toolchains, such as the GCC C++ compiler and the Visual C++ compiler. Qt also provides Qt Quick (which includes QML, a declarative scripting language based on ECMAScript) to write logic. This helps with rapid application development for mobile platforms, although the logic can be written using native code for the best possible performance. The ECMAScript/C++ combination...