The comparison operators (==, !=, <, <=, >, >=) are defined when the left hand of the operator is the same type as the right hand side, for string, float and integer types only. The operations result in integer types.
The logical (&&, ||, and !) and bitwise (& |, ^, and ~) operators are only defined for integers.

Operators higher in the table have higher precedence.

Order	Operator	Associativity	Description
15	()	L to R	Function call, expression grouping, structure member.
13	!		Logical negation
	~		One’s complement
	+		Unary plus
	-		Unary minus
	++		Increment
	--		Decrement
	(typename)		Type cast
12	*	L to R	Multiplication
	/		Division
	%		Modulus
11	+	L to R	Addition
	-		Subtraction
10	<	L to R	Less than
	>		Greater than
	<=		Less than or equal
	>=		Greater than or equal
9	==	L to R	Equal
	!=		Not equal
8	&	L to R	Bitwise AND
7	^	L to R	Bitwise exclusive OR
6	|	L to R	Bitwise OR
5	&&	L to R	Logical AND
4	||	L to R	Logical OR
3	? :	L to R	Ternary conditional
2	=	R to L	Assign to variable
	+=		Add and assign
	-=		Subract and assign
	*=		Multiply and assign
	/=		Divide and assign
	%=		Take modulus and assign
	&=		Take bitwise AND and assign
	|=		Take bitwise OR and assign
	^=		Take bitwise exclusive OR and assign
1	,	L to R	Argument separator