Q: What is Operator ?

Operator:
                 Operator is a system defined symbol which works on some values or expressions and return another value .
  ex-  3+4 is equal to seven,here 3 and 4 are operand and '+' is operator.
'C' language has rich library of operator category.
Some operators are:-

1. Assignment Operator
2. Arithmethic Operator
3. Relational Operator
4. Logical Operator
5. Increment Operator
6. Decrement Operator
7. Bitwise Operator
8. Size of() Operator 

 

1. Assignment Operator (=) :  It is used to assign the value of expression of right hand side to a storage space on left hand side.

'C' language support short hand assignment operator.

Operator	Expression	Assignment Operator
+ =	X= X+Y	X += Y
- =	X= X-Y	X -= Y
* =	X= X*Y	X *= Y
/ =	X= X/Y	X /= Y
% =	X=X%Y	X %= Y

2. Arithmetic Operator :- Arithmetic operator returns a value after working on some expression.These operator works on two operand

Operator          

+

-

*

/

%

Operation

Addition

Subtraction

Multipication

Division

Remainder

3.Relational Operator :  Relational operator compares two value of an expression and return true or false dependind upon the comparison.
some relational operator are:    <,<=, >, >=, == , !=

Logical Operators

Logical operators are used to combine expressions containing relation operators. In C, there are 3 logical operators:
- See more at: http://www.programiz.com/c-programming/c-operators#logical

Logical Operators

Logical operators are used to combine expressions containing relation operators. In C, there are 3 logical operators:
- See more at: http://www.programiz.com/c-programming/c-operators#logical

4.Logical Operator :- 

                       There are 3 logical operators:

||  logical OR
&&  logical AND
!  logical Not

a. Logical OR operator(||) :-    This operator also known as short-circuit logical OR operator. This operator check two conditions. It worrks ,if one or all two condition true than result true , otherwise result false.

Operand 1	Operand 2	Operand 1 || Operand 2
False	False	False
False	True	True
True	False	True
True	True	True

b. Logical AND Operator(&&) :-  This operator also known as short-circuit logical && operator.This operator check two conditions. It works, if all conditions true than result true , otherwise result false.

Operand 1	Operand 2	Operand 1 && operand 2
True	True	True
True	False	False
False	True	False
False	False	False

c.Logical NOT Operator (!) :-    It is a unary Operator .

Operand 1	Operand 2
False	True
True	False

5.Increment Operator (++) :-    Increment Operator increase the value  of the variable by one .

Expression        Operator
X=X+1                 X++
X=1+X                 ++X

6. Decrement Operator (--) :-  Decrement Operator decrease the value of the variable by one

Expression        Operator
X=X-1                 X--
X=1-X                 --X

7.Bitwise Operator :-  Bitwise operator is used to manipulate data at binary level.
                                                    They are used to certain operation faster .
                                                    All bitwise operator works only on integers or character type data.

   'C' Support following bitwise operator.

a. Bitwise Logical Operator :- 

Operator              Meaning
   &                      Bitwise  AND     
   |                        Bitwise  OR
   ^                        Bitwise  XOR

b. Bitwise Shift Operator :- 

Operator               Meaning
  >>                        Right Shift
  <<                        Left Shift

c. Bitwise One's Complement Operator :-

Operator               Meaning
     ~                   one's complement

8. Sizeof()  Operator:-     The sizeof operator returns the size of its operand in bytes. The sizeof operator always precedes its operand. The operand may be an expression or it may be a cast.

Example:

            Suppose i is an integer variable and c is a character type variable then

Printf(“Size of integer : %d”,sizeof(i));
Printf(“Size of character : %c”,sizeof(c));

Might generate the following output :
Size of integer : 2
Size of character : 1

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