What is the function of UI?

The user interface (UI) is the point at which human users interact with a computer, website or application. The goal of effective UI is to make the user’s experience easy and intuitive, requiring minimum effort on the user’s part to receive maximum desired outcome .

A user interface (UI) is one of the most significant parts of an information system (IS). A user-friendly UI helps users to carry out their tasks with efficiency, effectiveness, and satisfaction. UI consists of five elements: metaphor, mental model, navigation, interaction, and appearance.

“User Interface Development” is the development of websites, web applications, mobile applications and software development. “User Interface” plays a key role in the “software development life cycle”.

UI state is defined as a mostly consistent user interface shown in the window level, reflecting a specific piece of program functionality . An example of a UI state is a login window, in which the text content may change but the overall layout and functionality remain the same.