JavaScript - get array length

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This article will show you how to get array length in JavaScript.

Quick solution: 

// ONLINE-RUNNER:browser;

const array = [2, 4, 1, 5];

console.log(array.length);  // 4


Practical example

The .length property is very often used when iterating over an array.

// ONLINE-RUNNER:browser;

const array = [10, 20, 30, 40];

for (let i = 0; i < array.length; i++) {

Alternative titles

  1. JavaScript - how to get array length
  2. JavaScript - get array size
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