[Tutor] A simple "if" and "elif" problem

[Santosh Kumar]

I am reading the documentation and I'm in the section 4.1. Let me
write it down here:

>>> x = int(input("Please enter an integer: "))
Please enter an integer: 42
>>> if x < 0:
...      x = 0
...      print('Negative changed to zero')
... elif x == 0:
...      print('Zero')
... elif x == 1:
...      print('Single')
... else:
...      print('More')
...
More

Now I want to add a filter in this script, I want when a user enter a
string here it give a warning "Please enter a number like 0 or 2".