JavaScript primitive values, Booleans, numbers, and strings, are pseudo-objects : Introduction « Number Data Type « JavaScript Tutorial






  1. JavaScript Tutorial
  2. Number Data Type
  3. Introduction

They actually have properties and methods.

var sColor = "blue";
alert(sColor.length);    //outputs "4"








5.1.Introduction
5.1.1.Numbers
5.1.2.Number() Object
5.1.3.Variables are loosely typed.
5.1.4.Built-in Values
5.1.5.Special Numerical Values
5.1.6.Primitive and Reference Values
5.1.7.Primitive Types
5.1.8.The Undefined Type
5.1.9.The Null Type
5.1.10.The Boolean Type
5.1.11.The Number Type
5.1.12.Number.MAX_VALUE and Number.MIN_VALUE define the outer bounds of the Number value set
5.1.13.NaN stands for Not a Number
5.1.14.JavaScript primitive values, Booleans, numbers, and strings, are pseudo-objects
5.1.15.Reference Types