JavaScript Operators

Operators are the building blocks of any JavaScript program. They let you do math, compare values, make decisions, and store data. If you have ever written 2 + 2 or asked "is this value equal to that one?", you have already used an operator. Let's break them all down simply.

What are Operators?

An operator is a symbol that performs an action on one or more values. The values it works on are called operands.

5 + 3  // here, + is the operator, 5 and 3 are the operands

1. Arithmetic Operators

These do basic math. Nothing surprising here.

Operator	What it does	Example	Result
+	Addition	10 + 3	13
-	Subtraction	10 - 3	7
*	Multiplication	10 * 3	30
/	Division	10 / 2	5
%	Remainder (Modulo)	10 % 3	1

The % operator is worth a special mention. It gives you what is left over after division. So 10 % 3 is 1 because 3 goes into 10 three times, with 1 remaining. It is great for checking if a number is odd or even.

console.log(10 + 3);  // 13
console.log(10 % 3);  // 1
console.log(8 % 2);   // 0  (perfectly even, no remainder)

2. Comparison Operators

These compare two values and always return either true or false.

Operator	What it does	Example	Result
==	Equal (loose)	5 == "5"	true
===	Equal (strict)	5 === "5"	false
!=	Not equal	5 != 3	true
>	Greater than	10 > 5	true
<	Less than	3 < 7	true

The important one: == vs ===

This trips up a lot of beginners.

• == checks if values are equal, but it does not care about the type. So it will convert types before comparing.

• === checks if values are equal AND the same type. No conversion happens

console.log(5 == "5");   // true  — JS converts "5" to a number first
console.log(5 === "5");  // false — number is not the same type as string
console.log(5 === 5);    // true  — same value, same type

3. Logical Operators

These are used to combine or reverse conditions. They are the backbone of decision making in JavaScript.

Operator	Name	What it does
&&	AND	Returns true only if both sides are true
`		`
!	NOT	Flips true to false, and false to true

let age = 20;
let hasTicket = true;

console.log(age >= 18 && hasTicket);   // true  — both conditions met
console.log(age < 18 || hasTicket);    // true  — at least one is true
console.log(!hasTicket);               // false — flips true to false

4. Assignment Operators

These store values into variables. You already know =, but the shorthand versions save you from writing repetitive code.

Operator	What it does	Same as
=	Assigns a value	x = 5
+=	Adds and assigns	x = x + 3
-=	Subtracts and assigns	x = x - 3

let score = 10;

score += 5;   // score is now 15
score -= 3;   // score is now 12

console.log(score);  // 12

These are just shortcuts. score += 5 means exactly the same as score = score + 5.

That covers everything you need to know about JavaScript operators as a beginner.