Write a function count_digits (s) that counts the number of digits in the string s and returns
answer (an integer).
This function is internally using a for loop(in Python language, and keep it as simple as possible) please
def count_digits (s):
cnt=0
for i in range(len(s)):
if
(s[i]>='0') and (s[i]<='9'):
cnt=cnt+1
return cnt