Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

JavaScript JavaScript Loops, Arrays and Objects Tracking Multiple Items with Arrays Build a Quiz Challenge, Part 1 Solution

frits vd Velden
frits vd Velden
1,860 Points
Posted by frits vd Velden
frits vd Velden
1,860 Points

Different values in array

I'm using different values in my array, but after the first question my loop stops. It probably has something to do with the parsInt and the toUpperCase methods., but I can't figure it out. Thanks for helping in advance.

var correctAnswer = 0;

var questions = [
  ['How much is 10 + 10', 20],
  ['What does John Snow know?', 'NOTHING'],
  ['Is a tomato a vegetable or a fruit', 'YES']
  ];

var question;
var answer;
var response;
var html;


function print(message) {
  document.write(message);
}


for (var i = 0; i < questions.length; i += 1) {
  question = questions[i][0];
  answer = questions[i][1];
  response = parseInt(prompt(question));
  if (response === answer.toUpperCase()) {
    correctAnswer += 1;
  }
}

html = 'You got ' + correctAnswer + ' questions right';
print(html);

1 Answer

Steven Parker
Steven Parker
229,695 Points
Steven Parker
Steven Parker
229,695 Points

You're right, you can't do .toUpperCase() on a number. But you could store all your answers as strings (like "20") and then not use the parseInt at all.

Also, you probably want to convert the response into upper case instead of the answer (since it already is).

frits vd Velden
frits vd Velden
1,860 Points
frits vd Velden
frits vd Velden
1,860 Points

Of course! That makes total sense. Thanks!