JavaScript Literals

JavaScript mein literal ka simple matlab hota hai:
koi bhi value jo aap directly code mein likhte ho (without calculation or variable reference)

let x = 42;        // 42 is a numeric literal
let name = "Raj";  // "Raj" is a string literal

Rule:

• Direct value = literal

• No computation

• No function needed

Types of JavaScript Literals

1. Numeric Literals

Numbers ko different formats mein likh sakte ho:

let int = 25;
let float = 99.99;

let hex = 0xFF;     // 255
let binary = 0b1010; // 10
let octal = 0o17;    // 15

2. String Literals

let a = 'Hello';
let b = "World";
let c = `Hello World`;

Template Literals (Modern Way)

let name = "Amit";
console.log(`Hello ${name}`);

Features:

• Variable embedding (${})

• Expressions allowed

• Multi-line support

3. Boolean Literals

let isOnline = true;
let isAdmin = false;

Only two values:

• true

• false

4. Array Literals

let fruits = ["apple", "banana", "mango"];
let numbers = [1, 2, 3, 4];
let mixed = [1, "hello", true];

Index starts from 0

console.log(fruits[0]); // apple

5. Object Literals

let student = {
  name: "Rahul",
  age: 21,
  city: "Delhi"
};

Access::

console.log(student.name);

6. Special Literals

let a = null;       // intentional empty value
let b = undefined;  // value not assigned

Type	Meaning
null	intentionally empty
undefined	not assigned yet

Quick Summary