GTK is a free and open-source library used for building GUI applications. It was originally developed for the GIMP (GNU Image Manipulation Program) image editing software but has since become a standalone library used by many other applications.
int main(int argc, char *argv[]) gtk_init(&argc, &argv); gtk runtime
Most Linux distributions (Ubuntu, Fedora, Debian) come with GTK runtimes pre-installed. If you are developing software, you might need "development headers" (e.g., libgtk-3-dev ), but for daily use, the system handles it automatically through the package manager. GTK is a free and open-source library used