C operators

An operator is a symbol that indicates or tells the compiler for specific operations on given operands. Like assignment operator ‘=’ is used to assign a value.There are several operators in C language to perform various operations. These operators are categories as given below.Types of operator

Arithmetic operator	+,  -,  *,  /,  %
Relational operator	<, <=,  >,  >=
Equality operator	==,  !=
Logical operator	&&,  ||,  !
Assignment operator	=
Unary operator	-,  ++,  –,  sizeof
Bit wise operator	&,  |,  ^,  ~,  <<,  >>
Ternary operator or Conditional operator	? :

Assignment operator assign a value to a variable

Example:- int money;  /* Here we don’t know exact value of variable ‘money’ */ money = 10;  /* Using assignment operator we assign 10, now value of ‘money’ is 10*/

We wiil see below some example of arithmetic operators

4 + 5     = 9; 5 – 4      = 1; 5 * 4      = 20; 20 / 4     = 5; 21 / 4     = 5; 25 / 6     = 4; 20 % 4   = 0; 21 % 4   = 1; 25 % 10 = 5; Remember modulus( % ) operator always gives remainder.

Use of  unary operators.

Use of increment ( ++ ) operator a++; (This is called post increment, the value of a is incremented by one after executing this statment) ++a; (This is called pre increment, the value of a is incremented by one before executing this statment)Use of decrement ( — ) operator a–; (This is called post decrement, the value of a is decremented by one after executing this statment) –a; (This is called pre decrement, the value of a is decremented by one before executing this statment)sizeof operator is used to calculate the size of datatypes in number of bytes, sizeof can be applied to all datatypes.Note :- if you did not understand, no need to worry as we will use these operators in C program things will be more cleared.

Here I would like to explain bit wise operator in little detail because these are most useful operators in C.
&    –    Bitwise AND
|    –    Bitwise OR
^    –    Bitwise EX-OR
~    –    one’s complement

Bitwsie AND a        b        a&b 0       0             0 0        1            0 1        0            0 1        1            1

Bitwise OR a        b        a|b 0        0           0 0        1           1 1        0            1 1        1            1

Bitwise EX-OR a        b        a^b 0        0            0 0        1           1 1        0           1 1         1           0

Bitwise operators performs on one or more bit patterns or binary numerals levels of their indivisual bits.

Example :- 3 & 5   =  1         /*Here we do AND operation on bit representation of 3 and 4. */ 3 ->  0011 & 4->   0101 1->   0001