JavaScript: Get the last element from a given array

JavaScript fundamental (ES6 Syntax): Exercise-181 with Solution

Write a JavaScript program to get the last element from a given array.

• Check if arr is truthy and has a length property.
• Use Array.prototype.length - 1 to compute the index of the last element of the given array and return it, otherwise return undefined.

Sample Solution:

JavaScript Code:

// Define a function 'last' that takes an array 'arr' as input
const last = arr =>
  // Return the last element of the input array
  arr[arr.length - 1];

// Print the last element of the array [1, 2, 3]
console.log(last([1, 2, 3]));
// Print the last element of the array [1, 2, 3, 4, 5, 7]
console.log(last([1, 2, 3, 4, 5, 7]));

Output:

3
7

Visual Presentation:

Flowchart:

Live Demo:

See the Pen javascript-basic-exercise-181-1 by w3resource (@w3resource) on CodePen.

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