Finding unlike number in an array - JavaScript

We are required to write a JavaScript function that takes in an array of literals containing all similar elements but one. Our function should return the unlike number.

Example

Following is the code −

const arr = [2, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4];
// considering that the length of array is atleast 3
const findUnlike = arr => {
   for(let i = 1; i 
Output
Following is the output in the console −
2