"""
Learning Goals:
 - Implement helper functions in code to break up large problems into solvable subtasks
 - Recognize the four core rules of code maintenance
 - Use the input command and try/except structures to handle direct user input in code
 - Learn how to install and use external modules
"""

valid = False
while valid == False:
    try:
        age = int(input("What is your age?"))
        print("You'll be", age + 1, "next year.")
    except:
        print("That's not a number. Try again.")