JavaScript Get Last Element Of Array

The Best Methods For JavaScript Get Last Element Of Array

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Being a JS developer, you might have faced the problem with the array elements. And sometimes, you look for JavaScript get last element of array, which is quite difficult to find for some developers. 

But not anymore!!

Today’s Geeks! I am here with the best solution for this. 

But before that, I want to congratulate you (who is reading this blog), as you are putting your effort into learning the new concept of Javascript. 

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And I personally believe that asking the question or finding the answer to your question is the best way to learn. So, I congratulate you that you are on the right track in your learning journey. So now, I will definitely be going to help you in the best way.

So, let’s start with the new concept!

For upcoming geeks: A short summary about array in javascript

An array is one of the ordered lists of values in JavaScript. Each of the values can be called by an index value. A JavaScript array has the subsequent characteristics:

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  1. First, it is possible that an array may hold values of distinct types. It means you can have an array that stores the string and number, and also the boolean values.
  1. Second, the array’s length is auto-growing and dynamically sized. Or we can say that you don’t require defining the array size upfront.

Now, check what I will answer you today!

You already know that a Javascript array considers a variable that holds various values at a single time. The first & last (or any other) elements are reached by using an index starting from 0 (for the first element) and so on. But if you want to know about JavaScript get last element of array, then you can use different properties and functions. I have explained each one of them one by one in the upcoming section.

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Top 3 methods for JS get last element of array

Getting the JavaScript last element in array is easy. But it is only easy when you use the below-mentioned functions or properties. So let’s check them one by one.

array length property

The array length property is used to know the number of items in an array. If you use minus 1 with this property, then it will specify the last item’s index. Therefore, you can use it to know the last element of array JavaScript. Being a JS user, you might know that the indexing of the array element starts from 0. Thus, -1 helps to know the last element of the array.

Let’s take an example of it:

Output:

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16

at() method

The at() method is useful for taking an integer value and it will return the value at that particular index. Here users can define positive or negative integer values. But you have to keep in mind that the negative integer will count back from the last array element.

Let’s understand with an example about how to get JavaScript array last element using at()

Output:

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pear

slice() method

This method is popular to get last element of array JavaScript. It can return a particular element as the new object from the array. Here you keep in mind that this method does not change the existing array. Rather, the negative index value will calculate the index from the array end. 

Let’s understand it with an example:

Output:

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[16]

Bonus Point: 

Another easy and simple method to get JS last element of array is:

pop() method

If you have enough knowledge about JavaScript, then you might be thinking that this method is used to remove or pop the last element of an array. But you might not know that this is also useful for changing the array length. 

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Apart from this, you can use it for JavaScript get last element of array. So, now the question is how you can use it. Once you use the pop(), it will remove the last element. You can store that element in the new variable and call or get the element. This is how you can get JS last element of array.

Let’s take an example of it for a better understanding.

Output:

16

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Also Read

Let explore these methods more for “JavaScript get last element of array

What if you want to get the second or third last element of the array. Well for this, you can use any of the above-mentioned methods. Let’s take the example of Slice(). It is one of the most popular methods for JavaScript get last element of array. You can use it as:

Note: It will not include the element of the ending element’s index.

In the below example, I will find the third last element of the array.

Output:

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[12]

What about the performance of these methods for JavaScript to get last element of array?

As you know, you can use different methods to get the last element of an array in JavaScript, but what about their performance?  

Here, I have tested them and shown you the result. This will help you to know how these methods work.

Note: I have used the console.time and console.timeEnd method to test the time taken by the individual function.

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Output:

16

array length property: 0.15380859375 ms

16

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array at property: 0.197998046875 ms

[16]

array slice method: 0.442138671875 ms

16

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array pop method: 0.255126953125 ms

As you can see the length() method is quite faster as compared to other methods. Therefore, you can use it to get faster results.

Final thought!

I have seen that there is a long discussion about JavaScript get last element of array on platforms like Stack Overflow and more. But I can say that you can use any of the methods from length(), slice(), at(), and even pop(). Apart from this, you can use them for getting the second, third, or any other last element of the array.

I have also mentioned the test results of each method that help you know which method is faster. Now, you can use any of them from these methods at your convenience. 

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If you want to get more such topics then let us know through your email. I will help you with the detailed guide. Keep learning with us and improve your programming knowledge.

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