What is the difference between arrays and objects

Answer 1

Objects are key-value pairs containers:

var person = {
age: 42,
name: "Kev",
isAlive: true
}
person.age // 42
persone["name"] // "Kev"
person.length // undefined

Arrays are special objects that only accept numeric keys (aka indices), starting from 0. They represent an ordered list of data, have a self-updated length property and custom methods (see SoloLearn's tutorial).

var array = ["HTML", "CSS", 25, false, "Javascript"];

array[0] // "HTML"
array[3] // false
array.length // 5

https://www.sololearn.com/learn/JavaScript/1242
"In JavaScript, arrays always use numbered indexes.
It is better to use an object when you want the index to be a string (text).
Use an array when you want the index to be a number."

Answer 2

Please, specify the programming language. It would be great if you included it in relevant tags instead of "invincible".

Answer 3

Javascript