Command-line interface

A command-line interface (also called a CLI) is a way of interacting with a computer without using a graphical user interface (GUI) like you would with a mouse and keyboard. With a CLI, you can type in commands with your keyboard, and the computer will respond by doing something, like finding a file, drawing a picture, or sending a message. For example, you can use the Windows Command Prompt to type commands like "dir" (which will list all the files in the current directory) or "mkdir" (which will create a new directory). CLI programs are usually much faster than GUI programs, but they require more knowledge of how to use them since you're typing out all the commands.