JavaScript Operators

JavaScript operators are used to perform operations on values and variables — such as arithmetic, assignment, comparison, and more. Let’s break them down with simple examples.

JavaScript Assignment

The assignment operator = assigns a value to a variable:

let x = 10;     // Assign 10 to x
let y = 2;      // Assign 2 to y
let z = x + y;  // Assign 12 to z

JavaScript Addition

let x = 5;
let y = 2;
let z = x + y;  // Result is 7

JavaScript Multiplication

let x = 5;
let y = 2;
let z = x * y;  // Result is 10

Types of JavaScript Operators

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

JavaScript Arithmetic Operators

Used for basic math:

let a = 3;
let x = (100 + 50) * a;  // Result is 450

JavaScript Assignment Operators

let x = 10;
x += 5;  // Same as x = x + 5

JavaScript Comparison Operators

Return true or false based on comparison:

let age = 20;
console.log(age >= 18); // true

JavaScript Logical Operators

• && AND: true if both are true
• || OR: true if one is true
• ! NOT: reverses boolean

let isLoggedIn = true;
let isAdmin = false;

console.log(isLoggedIn && isAdmin); // false

JavaScript String Operator

The + operator also joins (concatenates) strings:

let firstName = "John";
let lastName = "Doe";
let fullName = firstName + " " + lastName;

JavaScript Bitwise Operators

Operate on binary numbers (less common in day-to-day JS):

• & AND
• | OR
• ^ XOR
• ~ NOT
• << Left Shift
• >> Right Shift

JavaScript Ternary Operator

A shorthand for if...else:

let age = 16;
let result = (age >= 18) ? "Adult" : "Minor";

JavaScript Type Operators

typeof checks the type, instanceof checks object type:

typeof "Hello"      // "string"
typeof 123           // "number"
[] instanceof Array  // true