Count Odd Digits X52586

Statement

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Write a function odd_digits(n) that receives a non-negative integer n and returns the number of occurrences of odd digits in n.

Observation

All integers are assumed written in the usual base 10.

Sample session

>>> odd_digits(2020)
0
>>> odd_digits(7654321)
4
>>> odd_digits(0)
0
>>> odd_digits(222182) + odd_digits(113)
4

Information