Count Digits

Count Digits

You need to count the number of digits in a given string.

Input: String.

Output: Integer.

Examples:

assert count_digits("hi") == 0
assert count_digits("who is 1st here") == 1
assert count_digits("my numbers is 2") == 1
assert (
    count_digits(
        "This picture is an oil on canvas painting by Danish artist Anna Petersen between 1845 and 1910 year"
    )
    == 8
)
40