nums = [6, 7, 8, 12, 19, 55, 90, 98];

searchItem = 55;
found = False;

start = 0;
end = len(nums);
mid = 0;

while (start <= end):
    mid = int((start + end) / 2);
    if nums[mid] == searchItem:
        print(f'found {searchItem} at index {mid}');
        found = True;
        break;
    elif nums[mid] > searchItem:
        end = mid - 1;
    else:
        start = mid + 1

if not found:
    print(f'{searchItem} was not found in nums');