def linear_search(values,search_for):
    search_at = 0
    search_res = False
    while search_at < len(values) and search_res is False:
        if values[search_at] == search_for:
            search_res = True
            print("Element found at postion",search_at)
        else:
            search_at = search_at + 1
    return search_res
list = [12,45,57,60,89,55]
print(linear_search(list,55))
print(linear_search(list,89))
list.reverse()
print(list)
list.sort()
print(list)
list.sort(reverse = True)
print(list)
