I've created a basic, multiple choice, interactive calculator in Python. I want the user to be able to have the option to stop the programme running by answering "No" when asked whether they want to test out my calculator.

I want to be able to **print("Ok, no problem")** which you can see is already there but I need something extra to stop the programme running if this is the answer that the user picks.

Code is below. See lines 12-13. 

```
    name = input("Hi There. What is your name? ")
    print("Well Hi " + name + ", it sure is nice to meet you")
    age = input("So how old are you anyway? ")
    print("Wow, you're " + age + " huh? ")

    print(name + " I would like you to try out the companies new calculator. Would you be 
    happy to do that? ")
    answer = input("Please answer Yes or No ")

    if answer == "Yes":
        print("Thank you, I appreciated that. Let's begin")

    elif answer == "No":
        print("Ok, no problem")

    else:
        print("Sorry I didn't quite get that. Please answer yes or no")

    import math
    number_1 = int(input("Please pick a number "))
    order = (input("Ok, now please pick either: +, -, / or * "))
    number_2 = int(input("Great, now please pick a second number "))

    if order == "+":
        print(number_1 + number_2)
    elif order == "-":
        print(number_1 - number_2)
    elif order == "/":
        print(number_1 / number_2)
    elif order == "*":
        print(number_1 * number_2)
    else:
        print("Sorry that is not +, -, / or *. Please enter a relevant order")

```

Any help that you can give me would be much appreciated.