Operators in JavaScript

Operators are special symbols or keywords used to perform operations on values or variables. They're the building blocks of logic and calculations in your programs.

JavaScript provides many types of operators, and each type does something different.

1. Arithmetic Operators

Used for performing basic math:

JavaScript Operators

Operator	Description	Example	Result
+	Addition	5 + 2	7
-	Subtraction	5 - 2	3
*	Multiplication	5 * 2	10
/	Division	10 / 2	5
%	Modulus (remainder)	5 % 2	1
**	Exponentiation	2 ** 3	8
++	Increment	x++	Adds 1
--	Decrement	x--	Subtracts 1

2. Assignment Operators

Used to assign values to variables.

JavaScript Assignment Operators

Operator	Example	Same As
=	x = 5	Assign 5 to x
+=	x += 2	x = x + 2
-=	x -= 2	x = x - 2
*=	x *= 2	x = x * 2
/=	x /= 2	x = x / 2
%=	x %= 2	x = x % 2

3. Comparison Operators

Used to compare two values. These return a Boolean (true or false).

JavaScript Comparison Operators

Operator	Description	Example	Result
==	Equal (loose)	5 == "5"	true
===	Equal (strict)	5 === "5"	false
!=	Not equal (loose)	5 != "5"	false
!==	Not equal (strict)	5 !== "5"	true
>	Greater than	6 > 3	true
<< /td>	Less than	3 < 6	true
>=	Greater than or equal to	5 >= 5	true
<=< /td>	Less than or equal to	5 <= 4	false

4. Logical Operators

Used to combine multiple conditions.

JavaScript Logical Operators

Operator	Description	Example	Result
&&	Logical AND	true && false	false
\|\|	Logical OR	true \|\| false	true
!	Logical NOT	!true	false

5. Type Operators

JavaScript Type Operators

Operator	Description	Example
typeof	Returns the type of a variable	typeof "hello" → "string"
instanceof	Checks if object is an instance of a class	obj instanceof Object

Bonus: String Concatenation

The + operator is also used to join strings:

let firstName = "John";
let lastName = "Doe";
let fullName = firstName + " " + lastName;
console.log(fullName); // John Doe