Understanding - Intermediate, exercise 3

Text

The variable my_digit contains a number from 0 to 9. Study the execution of the following function passing my_digit as input (i.e. algorithm(my_digit)).

def algorithm(cur_digit):
    result = None
    for digit in reversed(range(cur_digit)):
        if digit == cur_digit - 1:
            result = digit
        else:
            result = None
    return result

Hints

The function algorithm builds additional data from the input integers, that are used understand which result must be returned.

Additional material

The runnable Python file is available online. You can run it executing the command python exercise_3.py in a shell, and then following the instructions on screen to specify the intended input.