Please y'all should help explain this code, i don't understand it

Question

n = int(input())
length = 0
while n > 0:
n //= 10
length += 1

print(length)

Answer 1

it tells you the amount of digits in a number.

// is hard division (doesn't deal w/ remainders)

every time you // a number by 10, it takes a number off:
1000 // 10 = 100
100 // 10 = 10
10 // 10 = 1
1 // 10 = 0

There are 4 numbers in 1000

Answer 2

Another example:
1234 // 10 = 123
123 // 10 = 12
12 // 10 = 1
1 // 10 = 0

1234 has 4 digits.