Count number of digits using for loop in Python

Question

I want to count number of digits of any digits number without converting the number to string and also using for loop. Can someone suggest how to do this.

num = int(input("Enter any number : "))
temp = num
count = 0
for i in str(temp):
    temp = temp // 10
    count += 1
print(count)

Answer 1

You don't have to create a temp variable as num already contains the input.

If there should only digits being entered, you can first check that with a pattern, then get the length of the string without using any loop.

import re

inp = input("Enter any number : ")
m = re.match(r"\d+$", inp)

if m:
    print(len(m.group()))
else:
    print("There we not only digits in the input.")