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Javascript Array at() Method - GeeksforGeeks

Javascript Array at() Method

Last Updated : 14 Jul, 2024

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:

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.

Javascript Array at() Method Examples

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));

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);

Example 3: This code shows the value extracted from the Nested Array.

JavaScript
const arr = [45, [32, 27], 21];
const index = 1;

console.log(arr[1].at(index));

Supported Browsers:



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