zlacker

>>equili+(OP)
Wouldn't len(str(num)) be adequate here? This is a quite literal translation of what the code should be doing: measuring the length of the text representation of a number. The mathematical approach seems a little convoluted, although it serves the purpose of teaching a lesson.

>>nicbou+I93
Len() and str() are a loop under the hood.

>>_xnmw+ac3
len() is an O(1) lookup of the stored length on the unicode/bytes object in Python.