what is keyboard?

What is Keyboard?    

     Keyboard is the most common input device of the computer. It looks like a type writer machine. It has different types of keys. It contains more than 104 keys. A keyboard is used to type letters, numbers and special symbols. Without keyboard user cannot fulfil any types of works in a computer. A keyboard has an important role in a computer or laptop.

Types of Key.

Normally a keyboard has 5 types of keys.

1. Alphabetical Keys.
2. Numerical Keys.
3. Arrow Keys.
4. Functional Keys.
5. Special Purpose Keys.
   
   
   

Alphabetical Keys

    There are 26 alphabetical keys are represented in a standard keyboard. These  keys are

 numbered from A to Z or a to z. They are used to type name, address, letter, application etc.

Numerical Keys

     There are 10 numerical keys are represented in a standard keyboard. These  keys are

 numbered from 0 to 9. They help to enter slno, amount , Aadhar no, mobile no etc.

Arrow Keys

        They are otherwise called cursor movement keys/navigation keys. There are 4 arrow keys are represented in a standard keyboard. 

They are:

ç :- Left arrow key

è :- Right arrow key

é :- Upward arrow key

ê :- Downward arrow key

Functional Keys

        There are 12 functional keys are represented in a standard keyboard. They are numbered from f1 to f12. Each key has a different function in different applications. Out of  that 3 keys function is fixed when it individually use i.e 

F1:-Help and support

F2:-Rename 

F5:-Refresh

Special Purpose Keys

        The keys which are performs a special effect in a computer is known as special purpose keys. such as

Esc key:- This key is used to return back of dialog boxes, text boxes etc. It has an important role in Tally.

Tab key:- This key is used to jumps the cursor 8 character at a a time.

Caps Lock:-This key is used to capitalizes all alphabets when the shift key is unhold.

Shift Key:-This key is used to capitalizes all alphabets when the the caps lock is off.

Ctrl:-(Control Key):- It is a combinational key. It performs an effect when it combine with another key. Like

                        ctrl+a:-all select

                        ctrl+c:-copy

                        ctrl+p:-print

Alt:-(Alternatives):-It is also a combinational key like ctrl key. It performs an effect when it combine with another key but it active the menu bar and tabs of application.

                        Alt+ctrl+del:-Restart

                        Alt+f4:-Shut down

Space bar key:- It is the largest key of the keyboard. That gives space between to words.

Enter key:- It creates a new line.

Backspace key:- It erases character from left side of the cursor.

Del key:- It erases character from right side of the cursor.

Home Key:- This key is used to move the cursor to the starting of a line or sentence.

End Key:- This key is used to move the cursor to the ending of a line or sentence.

Page up :- This key is used to move to the previous page.

Page up :- This key is used to move to the next page.