Js Arrays — Free Javascript Tutorial
Learn Js Arrays in Javascript with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.
TL;DR: Learn Js 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
Js Arrays in Javascript
An array is an ordered list of values stored in a single variable. Arrays in JavaScript are zero-indexed and can hold mixed types (numbers, strings, objects, other arrays).
Essential array methods: push/pop (end), unshift/shift (start), splice (middle), slice (extract), indexOf/includes (find), sort, reverse. These modify or query the array.
Functional methods: map() transforms each item, filter() keeps matching items, reduce() accumulates to one value, forEach() runs a function on each item. These are essential for modern JS development.
Js Arrays — Syntax
const arr = [1, 2, 3]; arr.push(4); // add to end arr.pop(); // remove from end arr.includes(2); // → true arr.map(x => x*2); // → [2,4,6] arr.filter(x => x>1); // → [2,3]
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