What is function of Esc?

The Esc (Escape) key on a keyboard is mainly used to stop, exit, or cancel an operation. Its functions can vary depending on the program or operating system, but the most common uses include:

Canceling actions – stops a command or closes a dialog box.

Exiting full-screen mode – often used in browsers, media players, and presentations.

Interrupting processes – cancels ongoing tasks or operations.

Gaming shortcut – usually pauses the game or opens the main menu.

In general, the Esc key acts as a quick way to back out of tasks, menus, or screens without using a mouse or additional commands.