JavaScript has numerous operators that can be used, in part, to do mathematical calculations, assign values to variables, and compare values.

Below are just a few examples of these operators. After each section there is a link to a reference page for each, showing the complete list of operators and how they are used.

JavaScript arithmetic operators are used to perform arithmetic between variables and/or values.

Operator	Description
+	Addition
-	Subtraction
*	Multiplication
/	Division
**	Exponentiation
%	Modulus (remainder)

let x = 3 + 2; // addition, answer: 5

let x = 3 - 2; // subtraction, answer: 1

let x = 3 * 2; // multiplication, answer: 6

let x = 3 / 2; // division, answer: 1.5

let x = 3 ** 2 // exponentiation, same as 3 * 3, or 9

let x = 3 % 2; // modulus (getting the remainder), answer: 1

JavaScript assignment operators are used to assign values to variables.

Operator	Example	Same As
=	x = y	x = y
+=	x += y	x = x + y
-=	x -= y	x = x - y
*=	x *= y	x = x * y
/=	x /= y	x = x / y
**=	x **= y	x = x ** y
%=	x %= y	x = x % y

let x = y; // x will equal y

let x += y; // same as x = x + y

let x -= y; // same as x = x - y

let x *= y; // same as x = x * y

let x /= y; // same as x = x / y

let x **= y; // same as x = x ** y

let x %= y; // same as x = x % y

JavaScript comparison operators are used in logical statements to determine equality or inequality between variables and/or values.

Operator	Description
==	equal to
===	equal value and equal type
!=	not equal
!==	not equal value or not equal type
>	greater than
<	less than
>=	greater than or equal to
<=	less than or equal to

x == 8 // determines if x is equal to 8

x === 8 // determines if x is equal to 8 and is the same data type (8 not "8")

x != 8 // determines if x is NOT equal to 8

x !== 8 // determines if x is NOT equal to 8 OR is NOT the same data type (8 not "8")

x > 8 // determines if x is greater than 8

x < 8 // determines if x is less than 8

x >= 8 // determines if x is greater than or equal to 8

x <= 8 // determines if x is less than or equal to 8

Incrementing:

let x = 3;
x++; // x now equals 4

Decrementing:

let x = 3;
x--; // x now equals 2

• JavaScript – String Operators
• JavaScript – Logical Operators

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