Web Standards Programmer's Reference: HTML, CSS, JavaScript®, Perl, Python®, and PHP

20.3. Calculations and Operators

JavaScript supports the standard operators for numbers and strings. The following tables outline the basic operators available in JavaScript.

JavaScript Arithmetic Operators

Operator	Use
+	Addition
-	Subtraction
*	Multiplication
/	Division
%	Modulus
++	Increment
--	Decrement

JavaScript Assignment Operators

Operator	Use
=	Assignment
+=	Increment assignment
-=	Decrement assignment
*=	Multiplication assignment
/=	Division assignment
%=	Modulus assignment

JavaScript Comparison Operators

Operator	Use
==	Is equal to
===	Exactly equal to — in value and type
!=	Is not equal to
>	Is greater than
<	Is less than
>=	Is greater than or equal to
<=	Is less than or equal to

JavaScript Logical Operators

Operator	Use
&&	And
||	Or
!	Not

JavaScript Bitwise Operators

Operator	Use
&	And
|	Or
^	Xor
~	Not
<<	Left shift
>>	Right shift
>>>	Zero fill right shift

JavaScript Miscellaneous Operators

Operator	Use
.	Object/property/method separator
?	Condition operator
delete	Delete specified object
new	Create new object
this	Reference current object
typeof	Type of object (number, string, and so on)
void	Evaluate expression without returning a value

String Operators

Operator	Use
+	Concatenation

String Tokens

Token	Character
\\	Backslash
\'	Single quote
\"	Double quote
\b	Backspace
\f	Form Feed
\n	Line Feed
\r	Carriage Return
\t	Horizontal Tab
\v	Vertical Tab