Doing a basic binary search problem, but how do you know if it actually works if you cant see the number that's being returned??
function binarySearch(arr, val) {
let start = 0;
let end = arr.length - 1;
while (start <= end) {
let mid = Math.floor((start + end) / 2);
if (arr[mid] === val) {
return mid;
}
if (val < arr[mid]) {
end = mid - 1;
} else {
start = mid + 1;
}
}
return -1;
}
let arr = [1,9,3,4,5,7,2];
binarySearch(arr, 9);
The binary search only works if the array is sort. Use arr.sort()
If you want to debug or just see the print , you can try debugging option in any of the code editor or just add print before return statements with time , to realize what is returned