Pressing Alt + F4 is a keyboard shortcut commonly used in Windows operating systems to close the currently active application or window. When you press Alt + F4, the following typically happens:
The active application or window receives a "close" command.
If there are unsaved changes in the application, you may be prompted to save those changes before the application is closed.
If there are multiple open windows or applications, Alt + F4 will close the one that is currently in focus (the one you are actively using).
If you press Alt + F4 on the desktop (with no active window in focus), it will usually prompt you to shut down or restart your computer.
In essence, Alt + F4 is a quick way to close the currently active program or window without using the mouse to click the "X" button in the top-right corner of the window. It's a convenient way to manage multiple open applications on your computer.
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