Operators in C

Operators

Operators are symbols, which are used to perform certain operations on data.

Arithmetic operators:

            Arithmetic operators are used to perform arithmetic operation on values.

·         Addition _____+

·         Subtraction_____-

·         Multiplication_____*

·         Division_____ /

·         Modulus_____%

Modulus is used to find the reminder of values. Contrary to the division operator, which returns the quotient, it returns the reminder of an integral division.

Relational operators:

            Relational operators are used to compare two values. These operators always evaluates to true or false.

·         Equal to_____==

·         Less than_____<

·         Greater than_____>

·         Less than or equal to_____<=

·         Greater than or equal to_____>=

·         Not equal to_____ !=

Logical operators:

            Logical operators combine two or more relational expressions to construct compound expression.

The logical operators are:

·         And_____&&

·         Or_____||

·         Not_____!

Assignment operators:

            Assignment operator is used to store a value or a computational result in a variable. In C = symbol represents the assignment operator.

Increment & decrement operators:

            The increment operator increases the value of the operand by one. It is donated by “++ “.

Example:

            count++;

It means that the new value of count is assign after the increment of 1 in the previous value of count.

 Prefix:

            When ++ precedes its operand is called prefix.

Example:

            j=10;

i=++j;

First assign the value of j that is 10. Second first the value of j is incremented by one the new value of j is 11. Then the result will be assigned to variable i. So, the values of i and j are 11.

            Postfix:

                        When the ++ follows its operand it is called postfix increment.

            Example:

                        j=10;

                        i=j++;

            In the second statement the value of j is assigned to variable i and then the value of j will be incremented. Hence the value of i is 10 and the value of j in the memory is 11.

Decrement:

            The decrement operator decreases the value of its operand by one.

It is donated by -- .

·         It can be use as either the prefix or postfix operator in the same way as the increment operator is used.

Note: Both the increment and decrement operator are unary operators.

Compound assignment operators:

                                          There are four other compound assignment operators that can increment or decrement the value of their operand by other than one.

·         +=

·         -=

·         *=

·         /=

Example:

 The statement j+=5; increase the value of j by 5, the statement j=-5; decrease the value of j by 5. Similarly we can use *= and /= operators.

Operator precedence:

Operator precedence determined its order of evaluation in an expression.

Operator	Precedence
	Highest   lowest
!
*,  /,  %
+,  -
<,  <= ,  >,  >=
==,  !=
&&
||
=