JavaScript Array keys() Method Last Updated : 11 Jul, 2025 Comments Improve Suggest changes Like Article Like Report The Javascript array.keys() method is used to return a new array iterator which contains the keys for each index in the given input array. Syntax:array.keys()Parameters: This method does not accept any parameters. Return Values: It returns a new array iterator. The below example illustrates the Array keys() method in JavaScript:Example 1: In this example, we will see the use of Array.keys() method. javascript // Taking input as an array A // containing some elements. let A = [5, 6, 10]; // array.keys() method is called let iterator = A.keys(); // printing index array using the iterator for (let key of iterator) { console.log(key); } Output:0 1 2Example 2: In this example, we will see the use of Array.keys() method. javascript // Taking input as an array A // containing some elements. let A = ['gfg', 'geeks', 'cse', 'geekpro']; // array.keys() method is called let iterator = A.keys(); // printing index array using the iterator for (let key of iterator) { console.log(key); } Output:0 1 2 3We have a complete list of Javascript Array methods, to check those please go through this Javascript Array Complete reference article.Supported Browsers: The browsers supported by the JavaScript Array keys() method are listed below:Google Chrome 38.0Microsoft Edge 12.0Mozilla Firefox 28.0Safari 8.0Opera 25.0We have a Cheat Sheet on Javascript where we covered all the important topics of Javascript to check those please go through Javascript Cheat Sheet-A Basic guide to JavaScript. Comment More info K Kanchan_Ray Follow Improve Article Tags : JavaScript Web Technologies javascript-array JavaScript-Methods Explore JavaScript BasicsIntroduction to JavaScript4 min readVariables and Datatypes in JavaScript6 min readJavaScript Operators5 min readControl Statements in JavaScript4 min readArray & StringJavaScript Arrays7 min readJavaScript Array Methods7 min readJavaScript Strings6 min readJavaScript String Methods9 min readFunction & ObjectFunctions in JavaScript5 min readJavaScript Function Expression3 min readFunction Overloading in JavaScript4 min readObjects in Javascript4 min readJavaScript Object Constructors4 min readOOPObject Oriented Programming in JavaScript3 min readClasses and Objects in JavaScript4 min readWhat Are Access Modifiers In JavaScript ?5 min readJavaScript Constructor Method7 min readAsynchronous JavaScriptAsynchronous JavaScript2 min readJavaScript Callbacks4 min readJavaScript Promise4 min readEvent Loop in JavaScript4 min readAsync and Await in JavaScript2 min readException HandlingJavascript Error and Exceptional Handling6 min readJavaScript Errors Throw and Try to Catch2 min readHow to create custom errors in JavaScript ?2 min readJavaScript TypeError - Invalid Array.prototype.sort argument1 min readDOMHTML DOM (Document Object Model)9 min readHow to select DOM Elements in JavaScript ?3 min readJavaScript Custom Events4 min readJavaScript addEventListener() with Examples9 min readAdvanced TopicsClosure in JavaScript4 min readJavaScript Hoisting6 min readJavascript Scope3 min readJavaScript Higher Order Functions7 min readDebugging in JavaScript4 min read Like