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The previous code shows how to get the last element of an array by using the array's length, we are using the length property to determine the position of the last element, because the length of the array may vary so you can't use a fixed number, and since the array count always starts at 0, we can pick the last item by referencing the
Array.length - 1 item.
There is no built-in property or method created specifically to access the last element of an array, but there are different approaches to get it. The most common methods used are the following:
pop() method, a mutating method, and the
slice() method, a copying method. As mentioned before
pop() always changes the length and the content, but on the other hand
slice() returns a copy that contains some of the elements from the original array.
In the previous code we defined an array (
numbersArray), then we used the
slice() method to get the last element of the array by passing a negative
index(-1) (When using negative numbers it will look for the positions from the end to the beginning). Then it returns a new array with the elements that we specified (In this case the last element), and we accessed to the first and only value of that array.
In this given code snippet, we are getting the last element of the
numbers array using the
pop() method. It removes the last element of an array, and returns it. If you pick this approach you must keep in mind that the
pop() method modifies the original array.
In this code, we used the
length property and the
[ ] square bracket notation to get the last element of the array. Where the
length property returns the number of elements in an array, and the
[ ] notation is used to access an element at a specific index in the array, so we got the total number of elements in the array (using the length) and subtract 1 from this value to get the index of the last element (As the position numbers starts from 0).