JS-051
Educational JavaScript lesson graphic for Array: Learn to use arrays to store multiple values in a single variable
Beginner5 min~5 min read#array#arrays#collection

Array

Store multiple values

Goal

Learn to use arrays to store multiple values in a single variable.

Explanation

  • An Array is an ordered list of values.
  • An array can hold many elements.
  • Elements are written inside square brackets [].
  • Each element has its own number called an index.
  • Arrays are used in almost every program.

Analogy

Imagine a box containing several fruits. Instead of using a separate box for each fruit, you store them all in one container.

Code

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

console.log(fruits[0]);

Result: Apple

Common mistake

Beginners often think the first index is 1. In fact, array indexes start at 0.

Remember

  • ✦ An Array stores multiple values.
  • ✦ An array is created using [].
  • ✦ Elements have indexes.

Quick Quiz

What does fruits[0] return for ["Apple", "Banana", "Orange"]?

Resources