Why doesn't it work correctly?

Question

Python

a = int(input())
n = a % 10
a2 = a // 10
while(a2 != 0):
    z = a2 % 10
    if(n > z):
        ld = n
    else:
        ld = z
    a2 = a2 // 10
    print(ld)

You need to find the largest digit of the number. Could you tell me what is wrong here?

Answer 1

ldIt is desirable to declare a variable before the loop. Wrong indentation
. Too many unnecessary variables. The algorithm itself is correct, but I would rewrite it like this:print

input_value = int(input())
max_number = 0
while (input_value > 0):
    current_number = input_value % 10
    if (max_number < current_number):
        max_number = current_number
    input_value //= 10
print(max_number)

Answer 2

>>> max(list('1736'))
'7'