Arrays — Free JavaScript Tutorial
Learn Arrays in JavaScript with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.
TL;DR: Learn Arrays in JavaScript with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.
Written & reviewed by the Syllab.in Academic Team (CBSE/NCERT subject experts) · Updated
Arrays in JavaScript
Arrays store ordered lists of values. Created with `[]`. Access elements by index (0-based). `arr[0]` is first element.
Mutating methods: `.push()` (add end), `.pop()` (remove end), `.unshift()` (add start), `.shift()` (remove start), `.splice()` (insert/remove at index).
Non-mutating: `.slice()` (extract), `.concat()` (combine), `.indexOf()` (find index), `.includes()` (check existence).
`arr.length` gives the count. Arrays can hold mixed types: `[1, "hello", true, {name: "Arjun"}]`.
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