Function Design for Flashcard Programs

What is the purpose of the guess parameter in the function checkAnimal(guess)?

• To store the correct answer so the program knows what to check

• To receive the user’s input and compare it to the correct answer

• To make the function run automatically

• To output the correct animal

Tags

CCSS.RI.11-12.4

CCSS.RI.7.4

CCSS.RI.8.4

CCSS.RI.9-10.4

CCSS.RI.9-10.4

Question: You're building a flash card program that checks if the user’s answer is correct.

You’ve already written one function to display a question.
Now you want to write another function to check if the answer is correct.

Which of the following would be the most flexible way to design that second function?

• Hardcode the correct answer inside the function, like correctAnswer = 12, so it only checks one problem.

• Use global variables for everything so you don’t need to pass any values into the function.

• Put all the code into one function so you don’t have to reuse anything.

• Use a parameter so the function can check different answers depending on the question.

Why should your answer-checking function take at least one parameter?

• Because parameters make the program run faster

• To avoid using variables in your program

• So it can check answers for different questions, not just one

• So you can hardcode the answer for every question

You want to randomly generate a flashcard question like “5 + 7”. Where should that logic go?

• Inside the same function that checks the answer

• In a separate function that only creates the problem

• In the global variables

• It doesn't matter—it should be hardcoded

You write a function that checks if userAnswer == correctAnswer. What kind of value should that function return?

• A string that says "Correct!" or "Wrong!"

• A random number

• A boolean value: true or false

• It shouldn't return anything

In your flashcard program, you want to check if the user’s answer is correct. What is the best reason to use a parameter in your answer-checking function?

• So you don’t have to call the function from another function

• So the function always checks for the same answer every time

• So you can use the same function to check different answers for different questions

• So you can avoid using if statements