What is operator precedence ?

The precedence of an operator is the priority or the value (level) of the operator. Precedence decides the evaluation of the operators i.e. operators which has higher level of precedence are evaluated first.

Priority	Operator	Associativity	Description
	()	Left to Right	Function expression
1	[]		Array element reference
	->		Structure operator
	.		Structure operator (pointer)
	-	Right to Left	Unary minus
	+		Unary plus
	--		Decrement
	++		Increment
2	~		One’s complement
	!		Logical negation (NOT)
	*		Indirection (reference)
	&		Address
	(type)		Type conversion (type cast)
	Sizeof		Size of an operand in byte’s
	/	Left to Right	Division
3	*		Multiplication
	%		Modulus
4	+	Left to Right	Addition
	-		Subtraction
5	<<	Left to Right	Bitwise left shift
	>>		Bitwise right shift
	>	Left to Right	Greater than
6	>=		Greater than or equal to
	<		Less than
	<=		Less than or equal to
7	==	Left to Right	Equal to
	!=		Not equal to
8	&	Left to right	Bitwise AND
9	^	Left to right	Bitwise XOR
10	|	Left to right	Bitwise OR
11	&&	Left to right	Logical AND
12	||	Left to right	Logical OR
13	?:	Right to left	Conditional
14	= *= /= %= +=  -= &= ^= |= <<=  >>=	Right to left	Assignment