Operator Precedence

Operator Precedence

If an expression has more than one operator , it is important to know the order in which they will be applied .

The hierarchy of operator precedence is given below .

Unary operator :

Operator	Meaning	Associativity
-	Unary minus	Right to left
++	Increment	Right to left
--	Decrement	Right to left
!	Logical NOT	Right to left
sizeof	Sizeof	Right to left
(type)	Type definition	Right to left

Arithmetic Operators :

Operator	Meaning	Associativity
*	Multiply	Left to right
/	Divide	Left to right
%	Modulus	Left to right
+	Add	Left to right
-	Subtract	Left to right

Relational Operators :

Operator	Meaning	Associativity
<	Less than	Left to right
<=	Less than or equal to	Left to right
>	Greater than	Left to right
>=	Greater than or equal to	Left to right

Equality Operators :

Operator	Meaning	Associativity
==	Equal to	Left to right
!=	Not equal to	Left to right

Logical Operators:

Operator	Meaning	Associativity
&&	Logical AND	Left to right
||	Logical OR	Left to right

Conditional Operator:

Operator	Meaning	Associativity
?:	Conditional OR	Right to left

Assignment Operators:

Operator	Meaning	Associativity
=	Assign	Right to left
+=	Add	Right to left
-=	Subtract	Right to left
*=	Multiply	Right to left
/=	Divide	Right to left
%=	Modulus	Right to left

If x ,y and z are integer variables having the values 2 ,3 and 4 , then the value of the expression x*=2*(y+z)/3  would be .

Note :

The above expression is equivalent to x = x * (-2 * (y + z) /3) .

As the arithmetic operations precedes the assignment operation , the sequence of evaluation is as follows :

Expression evaluated	Result
(y+z)	7
-2 * (y+z) = 2*7	-14
(-2 *(y+z))/3 = -14/3	-4
x * (-2 *(y+z))/3 = 2*4	-8  The final result is 8

       

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