Week 3

Instructions

For all of the following, write both the function and some code that calls and tests the function.

Complete the following without using ANY outside aid. If necessary, refer only to the python help() command or the official documentation at https://python.org.

Use PyCharm to complete this task. I know that PyCharm has a built-in AI Assistant. I strongly recommend that you disable it. You are going to be quizzed on these skills in class, and you will not be allowed to use any outside assistance.

1. Write a function named multiply() with two parameters, a and b, that returns the result.
   • Verify that both a and b are integers.
   • Return nothing if either a or b is not an integer.
2. Write a function named divide() with two parameters, a and b, that returns the result of a / b.
   • Verify that both a and b are either integers.
   • Return nothing if either a or b is not a number.
   • Return nothing if b equals 0.
3. Write a calculator function
   • The function must contain an “infinite” while loop that does the following until the user chooses to ’exit'.
   • Prompt the user to make a choice of either multiply, divide, or exit.
   • Do not allow or handle an invalid choice.
   • If the user picks exit, the program must end.
   • Prompt the user to enter two values, a and b.
   • Based on their choice, call either your multiply() or divide() function.
   • If either multiply() or divide() returns nothing, print an error message.
   • Otherwise, print the result in the format, e.g, 4 * 5 = 20 or 2.4 / 1.2 = 2.0.
   • Round the divide result to the tenths place using the built-in round() function when printing.

Submission

Submit your .py file to Canvas for a check. You are not graded on completeness or correctness – this is for learning and feedback.

Key Skills

• Function definition: parameters and returns.
• Logical selection using if.
• Type checking using isinstance().
• Functions calling functions.