JavaScript Operators

Javascript operators are used to perform different types of mathematical and logical computations.

Examples:
The Assignment Operator = assigns values

The Addition Operator + adds values

The Multiplication Operator * multiplies values

The Comparison Operator > compares values

JavaScript Assignment

The Assignment Operator (=) assigns a value to a variable:

Assignment Examples
let x = 10;

JavaScript Addition
The Addition Operator (+) adds numbers:

Adding
let x = 5;
let y = 2;
let z = x + y;

JavaScript Multiplication
The Multiplication Operator (*) multiplies numbers:

Multiplying
let x = 5;
let y = 2;
let z = x * y;

Types of JavaScript Operators
There are different types of JavaScript operators:

Arithmetic Operators
Assignment Operators
Comparison Operators
String Operators
Logical Operators
Bitwise Operators
Ternary Operators
Type Operators

JavaScript Arithmetic Operators
Arithmetic Operators are used to perform arithmetic on numbers:

Arithmetic Operators Example
let a = 3;
let x = (100 + 50) * a;

Operator Description

• Addition
• Subtraction
• Multiplication ** Exponentiation (ES2016) / Division % Modulus (Division Remainder) ++ Increment -- Decrement

Note
Arithmetic operators are fully described in the JS Arithmetic chapter.

JavaScript Assignment Operators
Assignment operators assign values to JavaScript variables.

The Addition Assignment Operator (+=) adds a value to a variable.

Assignment
let x = 10;
x += 5;

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
Note
Assignment operators are fully described in the JS Assignment chapter.

JavaScript Comparison Operators
Operator Description
== equal to
=== equal value and equal type
!= not equal
!== vnot equal value or not equal type

 greater than

< less than
= greater than or equal to
<= less than or equal to
? ternary operator
Note
Comparison operators are fully described in the JS Comparisons chapter.

JavaScript String Comparison
All the comparison operators above can also be used on strings:

Example
let text1 = "A";
let text2 = "B";
let result = text1 < text2;