What defines a graphical user interface (GUI)?

A graphical user interface (GUI) is primarily defined by its use of graphical elements such as icons, buttons, and windows that allow users to interact with the computer in a visual way. This interface relies on the display of images and symbols to represent actions and functions, making it user-friendly and accessible, especially for those with less technical expertise. By clicking on icons or using visual controls, users can easily navigate software features and perform tasks without needing to memorize or type commands, as would be necessary in text-based systems.

In contrast, text-based interfaces rely heavily on written commands or instructions, which do not utilize visual elements prominently. Command-line interfaces are examples of this, requiring users to input specific text commands rather than interacting through visual representations. Programming syntax refers to the rules and structure of a programming language, which does not pertain to user interaction design. Hence, the icon-based interface characteristic of a GUI effectively distinguishes it from other types of interfaces, highlighting how users engage with the technology through visual components.