JavaScript Declarations and Assignments Data Types
Example
JavaScript variables can hold many data types: numbers, strings, arrays, objects and more:
// Number
var length = 16;
// String
var message = "Hello, World!";
// Array
var carNames = ['Chevrolet', 'Nissan', 'BMW'];
// Object
var person = {
firstName: "John",
lastName: "Doe"
};
JavaScript has dynamic types. This means that the same variable can be used as different types:
var a; // a is undefined
var a = 5; // a is a Number
var a = "John"; // a is a String
