Command-line interface (CLI) is also known as command-line user interface, console user interface and character user interface (CUI). In computing it a blanket term for some classes in a programming design fir reading line of text entered by user.
CLI is a mechanism which interact with operating system of a computer or software by typing commands to perform specific tasks. The CLI was the primary means of interaction with most computer systems until the introduction of the video display terminal in the mid-1960s and continued to be used throughout the 1970s and 1980s on Unix systems and personal computer systems including MS-DOS, CP/M and Apple DOS. The interface is usually implemented with a command line shell, which is a program that accepts commands as text input and converts commands to appropriate operating system functions.
stud::string --greeting = "Hello";
Unsigned into --exclamations = 1;