FAQ: 2D Arrays: Java - 2D Array Review

This community-built FAQ covers the “2D Array Review” exercise from the lesson “2D Arrays: Java”.

Paths and Courses
This exercise can be found in the following Codecademy content:

Learn Java

FAQs on the exercise 2D Array Review

There are currently no frequently asked questions associated with this exercise – that’s where you come in! You can contribute to this section by offering your own questions, answers, or clarifications on this exercise. Ask or answer a question by clicking reply (reply) below.

If you’ve had an “aha” moment about the concepts, formatting, syntax, or anything else with this exercise, consider sharing those insights! Teaching others and answering their questions is one of the best ways to learn and stay sharp.

Join the Discussion. Help a fellow learner on their journey.

Ask or answer a question about this exercise by clicking reply (reply) below!
You can also find further discussion and get answers to your questions over in #get-help.

Agree with a comment or answer? Like (like) to up-vote the contribution!

Need broader help or resources? Head to #get-help and #community:tips-and-resources. If you are wanting feedback or inspiration for a project, check out #project.

Looking for motivation to keep learning? Join our wider discussions in #community

Learn more about how to use this guide.

Found a bug? Report it online, or post in #community:Codecademy-Bug-Reporting

Have a question about your account or billing? Reach out to our customer support team!

None of the above? Find out where to ask other questions here!

Hi!

I have a question regarding the final section of the review exercise: For all exam grades less than 90, add 2 additional points to the grade in newScores.

I have solved it using the following code, which works fine:

for(int i = 0; i < newScores.length; i += 1){

    for(int j = 0; j < newScores[i].length; j += 1){

      if (newScores[i][j] < 90){

        newScores[i][j] += 2;

      }
    }
  }

However, initially, my code was this:

for(double[] scoreSet : newScores){

    for(double score : scoreSet){

      if (score < 90){

        score += 2;

      }
    }
  }

I could use the latter code to access the array values (for example by printing them), however, I couldn’t modify them. Why is that?

My thoughts are is that it is because in order to modify the array value, I need to access it’s location, rather than the value itself. Is that right?

Thank you!