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•  PrtScr: It is a special key present on the keyboard. Alone or in combination with the Windows Key or the Fn Key,
                   it is used to copy the image of the current screen onto the clipboard from where it can be pasted elsewhere in any
                   application software.
                 •  Break/Pause: It halts the current process or scrolling down of the long output. New laptops, these days, do not have
                   this key because it is more useful in a text-based environment.
                 •  Spacebar: It is the longest key placed in the last row on the keyboard. It inserts a single space in a text.
                 •  Backspace: It deletes the typed character or an object to the left of the blinking cursor.
                 •  Delete: It deletes the typed character or an object to the right of the blinking cursor.
                 •  Ctrl: It is a modifier key used in combination with the other keys to perform some basic functions in a Windows
                   environment.
                 •  Alt: It is a modifier key used in combination with the other keys to execute a command in an operating system.
                   For example, the key combinations like Ctrl+Alt+Delete will terminate an application task or reboot the operating
                   system and Alt+Esc will help us to switch between the different windows open on the computer.
                 •  Caps Lock: It works as a toggle key to switch between the capital letters or small letters at the time of giving an input to
                   the computer. If the Caps Lock key is ON, then capital letters are printed and if it is OFF, then small letters are printed.
                 •  Num Lock: It is present on the top-left corner of a keyboard's numeric keypad. It toggles the use of numbers on the
                   numeric keypad. If it is ON, then the numbers can be used as basic calculator otherwise, the alternate functions of
                   the keys are performed.
                 •  Scroll Lock: It stops the scrolling of text or halts the operation of a program. It is an obsolete key now and cannot be
                   found in new keyboards for laptops.
                 •  Esc: It is present on the top-left corner of a computer keyboard. It terminates or cancels the current running program.
                   It is also used to:
                      w close the current full screen.
                      w stop the loading of a current website.
                      w close a menu or a dialog box.
                 •  Insert: It works as a toggle key in a text editing to switch between two input modes:
                      w Overtype mode: It overwrites the text to the right of the cursor.
                      w Insert mode: It inserts new text at the cursor position, pushing existing text to the right.
                 •  Home: It returns the cursor to the beginning of a line, document, page or a screen, depending on the application
                   software used.
                 •  End: It returns the cursor to the end of a line, document, page or a screen, depending on the application software used.
                 •  Page Up: It helps us to move in the upward direction screen by screen. It is read as page up key.
                 •  Window: The Window key is a standard key with a Microsoft logo printed on it. It is used in the Windows operating
                   system to open a start menu. It also provides shortcuts to many other Windows functions.
                 •  Page Down: It helps us to move in the downward direction screen by screen. It is read as page down key.
                 •  Shift: It is a modifier key used to perform an alternate function if used in combination with the other keys with dual
                   functions. For example, if the Caps Lock key is off then Shift+d will print capital D. Shift + number key will print the
                   symbol printed on the number key, e.g. Shift+3 will print #.



                        Tick ( ) if you know this.
                            Toggle keys work in two alternate input modes – ON and OFF.
                           Modifier keys modify the action of another key when it is pressed together at the same time.

                           Alt is a modifier key used in combination with the other keys to execute a command in an operating system.
                           PrtScr is a special key present on the keyboard.





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