JavaScript operators are symbols that are used to perform operations on operands. For example:

var sum=10+20;

Here, + is the arithmetic operator and = is the assignment operator.

There are following types of operators in JavaScript.

  1. Arithmetic Operators
  2. Comparison (Relational) Operators
  3. Bitwise Operators
  4. Logical Operators
  5. Assignment Operators
  6. Special Operators

JavaScript Arithmetic Operators

Arithmetic operators are used to perform arithmetic operations on the operands. The following operators are known as JavaScript arithmetic operators.

Operator Description Example
+ Addition 10+20 = 30
– Subtraction 20-10 = 10
* Multiplication 10*20 = 200
/ Division 20/10 = 2
% Modulus (Remainder) 20%10 = 0
++ Increment var a=10; a++; Now a = 11
— Decrement var a=10; a–; Now a = 9

JavaScript Comparison Operators

The JavaScript comparison operator compares the two operands. The comparison operators are as follows:

Operator Description Example
== Is equal to 10==20 = false
=== Identical (equal and of same type) 10==20 = false
!= Not equal to 10!=20 = true
!== Not Identical 20!==20 = false
> Greater than 20>10 = true
>= Greater than or equal to 20>=10 = true
< Less than 20<10 = false
<= Less than or equal to 20<=10 = false

JavaScript Bitwise Operators

The bitwise operators perform bitwise operations on operands. The bitwise operators are as follows:

Operator Description Example
& Bitwise AND (10==20 & 20==33) = false
| Bitwise OR (10==20 | 20==33) = false
^ Bitwise XOR (10==20 ^ 20==33) = false
~ Bitwise NOT (~10) = -10
<< Bitwise Left Shift (10<<2) = 40
>> Bitwise Right Shift (10>>2) = 2
>>> Bitwise Right Shift with Zero (10>>>2) = 2

JavaScript Logical Operators

The following operators are known as JavaScript logical operators.

Operator Description Example
&& Logical AND (10==20 && 20==33) = false
|| Logical OR (10==20 || 20==33) = false
! Logical Not !(10==20) = true

JavaScript Assignment Operators

The following operators are known as JavaScript assignment operators.

Operator Description Example
= Assign 10+10 = 20
+= Add and assign var a=10; a+=20; Now a = 30
-= Subtract and assign var a=20; a-=10; Now a = 10
*= Multiply and assign var a=10; a*=20; Now a = 200
/= Divide and assign var a=10; a/=2; Now a = 5
%= Modulus and assign var a=10; a%=2; Now a = 0

JavaScript Special Operators

The following operators are known as JavaScript special operators.

Operator Description
(?:) Conditional Operator returns value based on the condition. It is like if-else.
, Comma Operator allows multiple expressions to be evaluated as single statement.
delete Delete Operator deletes a property from the object.
in In Operator checks if object has the given property
instanceof checks if the object is an instance of given type
new creates an instance (object)
typeof checks the type of object.
void it discards the expression’s return value.
yield checks what is returned in a generator by the generator’s iterator.