The JavaScript Array at() method takes an integer value (index) as a parameter and returns the element of that index. It allows positive and negative integers. For the negative integer, it counts back from the last element in the array.
Syntax:
at(index);
Parameter: This method accepts one parameter that are described below:
- index: This parameter specifies the array index of the element. The negative index value counts back from the end of array.
Return Value: The element corresponding to the specified index in the array. It returns undefined value if we access index < 0, or index + array.length.
Example 1: This code shows the value extracted at the given index.
Javascript
const arr = [45, 32, 69, 21];const index = 3;console.log(arr.at(index)); |
Output
21
Example 2: It will provide a function that returns the last element found in a specified array.
Javascript
const subjects = ["Maths", "Physics", "Biology", "Chemistry"];function lastElement(arr) { return arr.at(-1);}const item = lastElement(subjects);console.log(item);subjects.push("DSA");const item2 = lastElement(subjects);console.log(item2); |
Output
Chemistry DSA
Supported Browsers:
- Google Chrome 92
- Edge 92
- Firefox 90
- Opera 78
- Safari 15.4
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