# Input Validation
# - prompt
# - handle empty string
# - make it a number
# - handle exceptions
# - require valid input

age = 1
while age:
    age = input("What's your age? ")
    if age:
        try:
            age = int(float(age))
            print(f'Cool! You had {age} birthdays.')
        except:
            print('Please enter a number')

