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Programs That Can Compare

Programs That Can Compare

Learn how to choose portions of code to execute.

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Project requirements

Let’s attend to our client’s requirements for the project once again, this time focusing on the requirements highlighted in green for updating the score when the user answers a maths question correctly.

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Project requirements that require selective execution
Project requirements that require selective execution

What if

We know we’ll only need == to check for the answer’s correctness. What if we had something in Java that could let us update the score, but only if the userAnswer == correctAnswer:

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if (userAnswer == correctAnswer) {
    score = score + 1;
}
else {
    System.out.println("Unfortunately, your answer is not correct.");
}

Now, this code reads neatly. This is as easy as it looks—Java lets us use if-else to control the flow of code execution.

Either the IF or ELSE block will work, but never both, based on the condition being true or false. Can you tell?

1

Which line number will not get executed when the value of userAnswer is equal to correctAnswer in the code above?

A)

Line 1

B)

Line 2

C)

Line 4

D)

Line 5

Question 1 of 20 attempted

Bringing if inside our project

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