JavaScript Numbers: Methods and Examples Explained

In JavaScript, numbers are used to represent both integer and floating-point values. JavaScript has only one type of number (unlike other languages which may have int, float, double, etc.).

Types of Numbers in JavaScript

Integers: Whole numbers (e.g., 1, 42, -10)
Floating-Point Numbers: Decimal numbers (e.g., 3.14, -0.99)
Exponential Notation: Large or small numbers using e (e.g., 5e3 is 5000)
NaN (Not-a-Number): Represents an invalid number (e.g., parseInt("hello"))
Infinity & -Infinity: Represents positive or negative infinite values.

Example

let intNum = 42; // Integer

let floatNum = 3.14; // Floating-point number

let expNum = 2e5; // 200000

let infNum = Infinity; // Infinity

let nanValue = NaN; // Not-a-Number

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