How to Get Last Element in Array in Javascript
In this tutorial, you will learn how to get last element in array in javascript. We use the push()
method whenever we want to add an element to an array. This method always appends an element at the end of the array.
As you keep adding more elements to an array, it becomes extremely hard to keep track of the index of each element. There could be a scenario when you don’t care about other elements, but somehow you want to retrieve the last element in the array.
The length
property of an array gives us a total number of elements in an array. With the help of this property, we can easily retrieve the last element in the array.
In the following example, we have one global array and upon button click, we simply want to get the last element in the array and display it on the screen. Please have a look over the code example and steps given below.
HTML & CSS
- We have 3 elements in the HTML file (
div
,button
, andh1
). Thediv
element is just a wrapper for the rest of the elements. - The inner text for the
button
element is“Get”
and for theh1
element, it is“Result”
. - We have done some basic styling using CSS and added the link to our
style.css
stylesheet inside thehead
element. - We have also included our javascript file
script.js
with ascript
tag at the bottom.
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <link rel="stylesheet" href="style.css"> <title>Document</title> </head> <body> <div class="container"> <button>Get</button> <h1>Result</h1> </div> <script src="script.js"></script> </body> </html>
.container { display: flex; flex-direction: column; align-items: center; } button { padding: 10px 20px; }
Javascript
- We have selected the
button
element andh1
element using thedocument.querySelector()
method and stored them inbtnGet
andresult
variables respectively. - We have a global variable
fruits
and it holds an array of strings. - We have attached the
click
event listener to thebutton
element. - In the event handler function, we are using the
length
property of thefruits
array and subtracting 1 from it to get the index of the last element. - We are displaying that last element on the screen using the
innerText
property of theh1
element.
let btnGet = document.querySelector('button'); let result = document.querySelector('h1'); let fruits = ['Apple', 'Orange', 'Mango', 'Kiwi', 'Grapes', 'Banana', 'Dragon Fruit']; btnGet.addEventListener('click', () => { result.innerText = fruits[fruits.length-1]; });