Problem
We are required to write a JavaScript function that takes in an array of numbers. The array is sorted in ascending / increasing order and only one element in the array is out of order.
Our function should find and return that element.
Example
Following is the code −
const arr = [1, 2, 3, 4, 17, 5, 6, 7, 8]; const findWrongNumber = (arr = []) > { for(let i = 0; i < arr.length - 1; i++){ const el = arr[i]; if(el - arr[i + 1] < 0 && arr[i + 1] - arr[i + 2] > 0){ return arr[i + 1]; } }; }; console.log(findWrongNumber(arr));
Output
17