Please Help: Check if input is a whole number (in Python)

Question

Please help...

I found a code from 101computing.net that checks if the input is a number but I would like to ensure that the user's input is a whole number, >= 0 only (no negative numbers)

What do I need to include in my code to check if the number is >= 0?

Here is the code:

#How to make sure the user enters a number (integer) - www.101computing.net

def inputNumber(num):
while True:
try:
userInput = int(input(num))
except ValueError:
print("Not a valid input! Try again, enter a number.")
continue
else:
return userInput
break

#MAIN PROGRAM STARTS HERE:
age = inputNumber("Enter your age: ")

if (age >= 18):
print("You are old enough to vote.")
else:
print("You will be able to vote in " + str(18-age) + " year(s).")

Answer 1

You can use assert to make sure that the input is a whole number >= 0:

try:
age = int(input('Enter your age: '))
assert isinstance(age, int) and age >= 0
except (ValueError, AssertionError):
print('Please enter a valid age.')

Answer 2

You're welcome 👌😀

Answer 3

Thank you very much, Anna. We have the same name. :) It worked. I appreciate your help very much. :)

Answer 4

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