"""
Write a Python program that can take a positive integer greater than 2 as input and write out the number of times
one must repeatedly divide this number by 2 before getting a value less than 2.
"""


def count_steps():
    # input validation: try that input is an integer
    while True:
        try:
            current_value = int(input("Please enter an integer greater than 2: "))
            # also try that input is above 2, if not print error message
            if current_value <= 2:
                print("Invalid input: Please enter only integers greater than 2.")
            # if input is correct, break the while loop
            else:
                break
        # Handle ValueError and print error message
        except ValueError:
            print("Invalid input: Please only enter integers.")

    # set 'step_count' variable to count divisions
    step_count = 0
    # iterate divisions over 'current_value' until it is lower than 2
    while current_value >= 2:
        current_value = current_value / 2
        # add division step to 'step_count'
        step_count += 1
    print(step_count)


count_steps()