# Functions go here


def not_blank(question):
    """Checks that a user response is not blank"""

    while True:
        response = input(question)

        if response != "":
            return response

        print("Sorry this can't be blank. Please try again. \n")


def int_check(question):
    """Checks users enter an integer that is more than zero (or the 'xxx' exit code)"""

    error = "Oops - please enter an integer"

    while True:

        try:
            # Return the response if it's an integer
            response = int(input(question))

            return response

        except ValueError:

            def string_check(question, valid_answers=('yes', 'no'),
                             num_letters=1):
                """Checks that users enter the full word
                or the 'n' letter/s of a word from a list of valid responses"""

                while True:
                    response = input(question).lower()

                    for item in valid_answers:

                        # check if the response is the entire word
                        if response == item:
                            return item

                        # check if it's the 'n' letters
                        elif response == item[:num_letters]:
                            return item

                    print(f"Please choose an option from {valid_answers}")


# main program heading
make_statement("Pizza Program", "🍕")

print()
want_instructions = string_check("Do you want to see the instructions? ", yes_no)

if want_instructions == "yes":
    instructions()

print()

name = not_blank("Please enter your name: ")

Number = not_blank("Please enter your phone number: ")

delivery_type = string_check(f"Greetings {name}. Is the order pickup or delivery? ", pickup_del)

print(f"You chose {delivery_type}")

print()
address = not_blank("Please enter your address: ")