Error in Python script

[GOTO10]

I agree with buran that your assignment is a bit too vague. It tells you to check the user's input, but not what to check for or or how to respond to invalid input.

I'd do something like this:

while True:
    try:
        temp = float(input("Enter your dog's age: "))
        break
    except ValueError:
        print('Invalid input! Please enter numbers only.')

This will keep prompting until the user enters something that can be converted to a float.