Calculator

Recall from lecture that we created a program to add two numbers together, calculator.py. This program worked well, at least until a user entered something like “dog” or “cat!” Let’s explore how we can better guard against this type of malicious behavior, using a computing concept called an “exception.”

In a file called calculator.py, implement a program in Python that prompts the user for two integers and then sums them together. If the user doesn’t cooperate, instead inputting a word (or a decimal!) for either prompt, kindly re-prompt them. Or, simply exit the program.

How to Test

Here’s how to test your code manually:

• Run your program with python calculator.py. Type 1 followed by 1 and press Enter. Your program should output:

  2
  

• Run your program with python calculator.py. Type 1 followed by dog and press Enter. Your program should either re-prompt the user for the second number, or exit after printing an error message.