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

Darien Kim
Darien Kim
3,126 Points
Posted by Darien Kim
Darien Kim
3,126 Points

Array questions show up all together.help.

var questions = [ ['what is 4+8?', 12], ['what is 4-1?', 3], ['what is 1+1?', 2] ];

var correctAnswer = 0; 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(questions)); response = parseInt(response); }

the questions show up all together. I can't find error inside code.

2 Answers

Gavin Ralston
Gavin Ralston
28,770 Points
Gavin Ralston
Gavin Ralston
28,770 Points 
response = parseInt(prompt(questions))

You're sending the questions array to the prompt function, so it'll print them all.

That's at a glance, and since the code wasn't wrapped in markdown it's hard to read, but that's my best guess.

Hope that helps!

Darien Kim
Darien Kim
3,126 Points
Darien Kim
Darien Kim
3,126 Points

ahh. Thanks. I should've taken away the "s" off from the questions!

Marcus Parsons
Marcus Parsons
15,719 Points

Btw, it's much faster to just wrap each number in a set of quotes so that they're strings instead of numbers because parsing the integer from each question is a slower process than comparing strings. And, without parsing for an integer, you can add questions that don't exclusively involve numbers, as well.

var questions = [ 
['what is 4+8?', '12'], 
['what is 4-1?', '3'], 
['what is 1+1?', '2'], 
['Can we now add varying questions to this quiz?', 'yes'] 
];

var correctAnswer = 0; 
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 = prompt(question); 
}