What is computer user interface with it's two types of computer user interface ?

A computer user interface is the point of interaction between the user and the computer system. It allows users to communicate with the computer and control its functions. There are two main types of computer user interfaces:

1. Command Line Interface (CLI): In a CLI, users interact with the computer by typing commands into a text-based interface. The computer then executes these commands and provides feedback to the user. CLI interfaces are typically used by more advanced users and are known for their efficiency and flexibility.

2. Graphical User Interface (GUI): A GUI allows users to interact with the computer using graphical elements such as icons, windows, and menus. Users can perform tasks by clicking on these elements with a mouse or using touch gestures on a touchscreen device. GUI interfaces are more user-friendly and intuitive, making them popular among casual users.

What is a user