The JavaScript Arrays object is a global object that is used to store multiple values in a single variable.
The JavaScript Arrays object is a global object that is used to store multiple values in a single variable i.e. collection of elements.
var cars = [ "Fiat", "BMW", "Nissan" ];
Note: Never put a comma after the last element (like “Nissan”,). This can be effected is inconsistent across different browsers.
var cars = new Array("Fiat", "BMW", "Nissan");
Use [] instead because, there is no need to use the JavaScript’s new Array().
Read Also: Detect Browser in JavaScript
By index number, you can an array element.
var firstCar = cars[0];
cars[0] is the first element
cars[1] is the second element
cars[2] is the third element
So, for last element:
var lastCar = cars[cars.length - 1];
The length property of an array returns the length of an array.
console.log(cars.length);
cars.forEach(function (item, index, array) { console.log(item, index); });
var newArray = cars.push("Innova");
var lastArray = cars.pop();
var first = cars.shift();
var newLength = cars.unshift("Alto");
var pos = cars.indexOf("Innova");
var removedItem = cars.splice(pos, 1);
var carsCopy = cars.slice();
typeof cars;
The difference between Arrays and Objects is that arrays use numbered indexes whereas objects use named indexes.
Based on United States, Jacob Frazier is a skilled JavaScript developer with over 8 years of experience. He is passionate about change and trying new things, both professionally and personally. He loves startups and is extremely proactive.
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Arrays are a special type of objects. The typeof operator in JavaScript returns object for arrays.