Computer Science

Computer Keyboard and its Functions

The Computer Keyboard is used to enter information into your computer, including letters, words, and numbers. Press a few keyboard keys while typing. The number keys on the top of the keyboard are also on the right side of the keyboard. The character keys are located in the center of the keyboard.

What is Typing?

A computer keyboard is an input device that allows anyone to type letters, numbers and other symbols (together) on a computer. It is one of the most widely used input devices for computers. Using a keyboard is often called typing.



Using your keyboard

Keyboards are an important tool for entering information into your computer when entering or calculating numerical data. But did you know that you can control your computer with a keyboard? Learning some simple keyboard shortcuts (instructions for your computer) will help you to work more efficiently.

How the keys are organized?

There are the following  keys on your keyboard can be divided into several groups based on function:

  • Typing (alphanumeric) keys:  These keys contain the same characters, numbers, punctuation and punctuation that are found on traditional typewriters.
  • Control button:  These keys can be used individually or in combination with other keys to perform specific actions. The most commonly used control keys are Ctrl and Alt, Windows Logo Key, Windows Logo Key, and Esc.
  • Function keys:  Function keys are used for specific tasks. Classification F1, F2, F3 etc. Rated up to F12. The function of these buttons varies from program to program.
  • Directory key:  These keys are used to view documents and web pages and to edit text. Including arrow keys, home, end, page up, page down, delete and enter.
  • Numeric keys:  The numeric keypad is easy to use for quick number entry. The keys are divided into blocks like a traditional calculator or adder.

The diagram below shows how these keys are located on a standard keyboard. The layout of the keyboard may be different.

Typing text

When you type something into an application, email, or text field, you see a flashing line (cursor image) called a cursor or entry point. Shows where the text you typed begins. You can move the cursor with the mouse by clicking on the desired location or using the navigation keys (see the “Using the navigation keys” section of this article).

Keys include Shift, Caps Lock, Tab, Enter, Space and Backspace, in addition to letters, numbers, punctuation and symbols.

Key names How to use it

Press and hold the Shift key next to a letter to enter a capital letter. Press Shift and Repeat to enter a symbol on that key.

Caps Lock Press capital letters once to enter all capital letters. Repeat the Caps Lock key to disable this feature. The keyboard may have a Caps Lock key light.

Click the tab to move the cursor to multiple locations. You can also leave the tab to go to the next text box on the form.

Enter Press Enter to move to the beginning of the next line of the cursor. Click Enter to select the selected key in the dialog box.
Spacebar Press the space bar to move the cursor to the desired location.
Backspace Press the space key to delete the character in front of the selected text or cursor.


Using keyboard shortcuts

Keyboard shortcuts are a way to use the keyboard. It is called a shortcut because it speeds it up. In fact, the functions and commands you use with the mouse can be executed quickly by using one or more keys on the keyboard.

In the help text, a slash (+) between two or more keys indicates that they should be pressed. Combinations For example, hold down Ctrl + A and hold down Ctrl, press A. Press Ctrl + Shift + A to hold Ctrl + Shift.

Find program shortcuts

You can use the keyboard to work with most applications. Open the menu to see which applications have keyboard shortcuts. Shortcuts (if any) appear next to menu items.

Keyboard Shortcut

Keyboard shortcuts appear next to menu items.

Choose menus, commands, and options

You can open the menu and select Commands and other options from the keyboard. Using the corresponding mail menus, press Alt and underline to open the corresponding menu. Click the underlined letter in the menu item to select that command. Overlay characters can be printed (offline) for applications that use ribbon, such as Paint and WordPad.

Underline letters-

Press Alt + F to open the file menu and press P to select the print command.

This method also works with dialog boxes. When you see an optional post in the dialog box, you can press Alt to add that option to that option.

Using navigation keys

Directory keys let you move the cursor, browse documents and web pages, and edit text. The following table lists some common features of these keys.

Useful Navigation Keys-
Press these navigation keys wOrk of these navigation keys that do
Left Arrow, Right Arrow, Up Arrow, or Down Arrow Move the cursor, select a location or line in the direction of the arrow, or scroll the web in the direction of the arrow at computer screen.
Home Move the cursor to the end of a line or move to the top of a webpage at computer screen.
End Move the cursor to the end of a line or move to the bottom of a webpage at computer screen.
Ctrl + Home Move to the top of a document at computer screen.
Ctrl + End Move to the bottom of a document at computer screen.
Page Up Move the cursor or page up one screen at computer screen.
Page Down Move the cursor or page down one screen at computer screen.

Delete the character after the cursor, or the selected text; in Windows, delete the selected item and move it to the Recycle Bin at computer screen.

Insert Turn Insert mode off or on. When Insert mode is on, text that you type is inserted at the cursor. When Insert mode is off, text that you type replaces existing characters at computer screen.


Using the numeric keypad

The numeric keypad sorts numbers from 0 to 9, math operator + (addition), (subtraction), * (duplicate) / (class) and decimal point as shown on the calculator. Of course, these characters are repeated elsewhere on the keyboard, but the keyboard layout allows you to quickly enter numerical information or perform math tasks with one hand.

Numeric key

Numeric Keyboard

Press Numeric Lock to use the numeric keypad to enter numbers. Most keyboards have the Num Lock light on or off. When Numeric Lock is off, the number pad acts as a set of secondary navigation keys (these functions are installed on the keys next to numbers or symbols).

Three odd keys

So far we have discussed every key you can use. For more, check out the three most secret keys on your keyboard: PrtScn, Scroll Lock and Pause / Pause.

PrtScn (or Print Screen)

This key does what it said a long time ago – it sends the current text screen to your printer. PrtScn Printing now takes a picture of your full screen (“screen shot”) and copies it to a clipboard in your computer’s memory. You can then paste (Ctrl + V) into Microsoft Paint or another program and print from that program if you wish.

The most obscure is the SYS RQ, which on some consoles shares a key with PrtScn. Historically, SYS RQ was designed as a “system request”, but this command is disabled in Windows.

Tip: Press Alt + PrtScn to take a picture of the enabled window instead of the full screen.

ScrLk (or Scroll Lock)

Installing Scroll Lock does not work with most programs. Pressing the Scroll Lock in some programs changes the behavior of the arrow keys and the up and down keys; Pressing these keys will scroll through the document without changing the position or selecting the cursor. The keyboard may have a light indicating if scroll lock is enabled.

Pause / Break

This key is rarely used. In some older programs, pressing this key will terminate the program or stop it from working with Ctrl.

Other keys

Some modern keyboards include “keyboard shortcuts” or buttons, programs, files, or commands with just one button. Other models include volume controls, scroll wheel, zoom wheel, and other devices. For details on these features, see the information that came with your keyboard or computer or visit the manufacturer’s website.

Tips for using your keyboard safely

Proper use of the keyboard will help prevent pain or injury to your hands, arms, and hands, especially if you have been using a computer for a long time. Here are some tips to improve your keyboard usage

  • Place the keyboard under the elbow. Your hands should be resting on your sides.
  • Hold the keyboard in front of you in front of you. If your keyboard has a numeric keypad, you can use the space bar as the center.
  • Instead of raising your fingers, use your whole arm to press the keyboard with your hands and wrists to access the farthest keys.
  • Avoid placing your hands or wrists on anything when writing. If your keyboard has a break, just use it when typing.
  • Use a light grip and straighten your wrist while writing.
  • If you’re not typing, relax your arms and hands.
  • Take a little break from using the computer every 15 to 20 minutes.

Operate Calculator with these Numeric Key

  • Open the calculator by clicking the Start button. Type a calculator in the search box, then click calculator in the list of results.
  • Numeric Lock Check the keyboard light to see the light. Otherwise press Numeric Lock.
  • Use the numeric keypad and enter the original serial number.
  • Press + to add – subtract, * multiply or subtract + on the keyboard.
  • Enter the following number in the account.
  • Click Submit to complete the calculation.

Useful Shortcuts

The following table lists some of the most important keyboard shortcuts. See keyboard shortcuts for more details.

Useful Shortcuts
Press these keys to wOrk of these keys that do
Windows logo keyPicture of the Windows logo key Open the Start menu of computer
Alt +Tab Switch between open programs or windows of computer
Alt +F4 Close the active item, or exit the active program of computer
Ctrl + S Save the current file or document (works in most programs) of computer
Ctrl +C Copy the selected item of computer
Ctrl  +X Cut the selected item of computer
Ctrl +V Paste the selected item of computer
Ctrl +Z Undo an action of computer
Ctrl +A Select all items in a document or window of computer
F1 Display Help for a program or Windows of computer
Windows logo key Picture of the Windows logo key +F1 Display Windows Help and Support of computer

Cancel the current task of computer

Application key Open a menu of commands related to a selection in a program. Equivalent to right-clicking the selection. of computer

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