help with zip code coach improvement

Question

Hi, i passed the tests but this answer doesnt feel good...ideas? Thanks! This is for the "code coach" zip code problem

zip = input()
if zip.isdigit and len(zip) == 5 and ' ' not in zip:
print("true")
else:
print("false")

Answer 1

if zip.isdigit()

Answer 2

You forgot ().

Answer 3

isdigit is a method. You need to call this method, then it will check if the string contains only digits.

If you just write...

if 'word'.isdigit:
...

... then you basically only ask:

Does the method isdigit exist? (It does.)

Answer 4

what do u mean sir?

Answer 5

oh, it still passed without it, what will the () do, and what did not having them do? Thanks!!

i thought the parenth was only to specify if it was a certain dig