Qt Core
Qt Core is the foundational module of the Qt framework, providing essential non-GUI functionality for cross-platform C++ development. It includes core classes for object communication (signals and slots), event handling, threading, file I/O, and data structures. This module serves as the base for all other Qt modules, enabling developers to build robust applications with a consistent API across operating systems.
Developers should learn Qt Core when building cross-platform C++ applications that require core system functionality without a graphical user interface, such as backend services, command-line tools, or libraries. It is essential for leveraging Qt's object model, which simplifies memory management and inter-object communication through its signals and slots mechanism, making code more maintainable and scalable. Use cases include embedded systems, server applications, and as a foundation for GUI apps using Qt Widgets or Qt Quick.