# Check that users have entered a valid
# option based on a list
def string_checker(question, valid_ans=('yes', 'no')):

    error = f"please enter a valid option from following list: {valid_ans}"

    while True:

        user_response = input(question).lower()

        for item in valid_ans:
            if item == user_response:
                return item

            elif user_response == item[0]:
                return item
        # print error if user does not enter something that valid
        print(error)
        print()


# Displays instructions

def instruction():
    print('''
****Instructions****
You will see simple math questions like:
> 2 x 5 = ?

Type your answer in the space provided.
Example:
> If the question is 2 x 5 = ?, the correct answer is 10.

If you answer correctly, you move on to the next question.
✔ Correct: 2 x 5 = 10 → Great job!

If you answer incorrectly, don’t worry!
✘ Wrong: 2 x 5 = 12 → That’s not right. The correct answer will be shown so you can learn.

Try to get as many correct as you can!

Good Luck!
''')


# Main routine

print("🧠📝💡Multiplication Quiz🧠📝💡")
print()

# ask user if they want to see the instructions and display them if requested
want_instructions = string_checker("Do you want to read the instructions? ")

# checks users enter yes (y) or no (n)
if want_instructions == "yes":
    instruction()

print("program continues")