Help with this while loop please-python

Question

Im having an issue I can’t seem to figure out. If i run this code without the while loop I get the first digit I need. Great. Yet Can someone help me understand what I am doing wrong please? I know it’s the while loop but it doesn’t except n as True no matter no matter why integer input I give
n = int(input())
sum = 0
while n > 0:
num = n % 10
sum += num
print(sum)

Answer 1

The problem is that it is an infinite loop as you never change the value of n. Also, you shouldn't use sum and other built-in names (list, float, min, max) as a variable name as it will redefine them.
What you want is;
n = int(input())
total = 0
while n > 0:
total += n % 10
n //= 10
print(total)

Answer 2

Ah i knew it was something simple. And thanks about the sum usage aspect. I think i actuly saw that in a lesson...or maybe a comment.
Thanks again!