What is shell in ? related to CLI ( command line interface) and GUI ( graphical user interface )

What is shell in ? related to CLI ( command line interface) and GUI ( graphical user interface )

What is shell in computer science related to CLI and GUI | Shell ka matlab kya hai

A shell is a computer program which exposes an operating system's services to a human user or other programs.

Operating system shells use either a command-line interface (CLI) or graphical user interface (GUI), depending on a computer's role and particular operation.

Command-line shells require the user to be familiar with commands and their calling syntax, and to understand concepts about the shell-specific scripting language (for example, bash).

A graphical user interface (GUI) provides means for manipulating programs graphically, by allowing for operations such as opening, closing, moving and resizing windows, as well as switching focus between windows. Graphical shells may be included with desktop environments or come separately, even as a set of loosely coupled utilities.