JS-052
Visual JavaScript guide to Array Index: Learn to find array elements by their index
Beginner4 min~4 min read#array#index#arrays

Array Index

An element's position

Goal

Learn to find array elements by their index.

Explanation

  • Every element in an array has its own number.
  • This number is called an index.
  • The first element always has index 0.
  • The second element has index 1.
  • You can use an index to access any element in an array.

Analogy

Imagine shelves in a cabinet. Each shelf has a number, so you can easily find the item you need.

Code

const fruits = [
  "Apple",
  "Banana",
  "Orange"
];

console.log(fruits[0]);

Result: Apple

Common mistake

Beginners often think the first element has index 1. In JavaScript, indexing starts at 0.

Remember

  • ✦ An index is an element's number.
  • ✦ The first index is always 0.
  • ✦ Elements are accessed using square brackets [].

Quick Quiz

What is the index of the first element in an array?

Resources