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

Victor Gordian
Victor Gordian
4,656 Points

I'm stuck

var questions = [
['What color is the sky?', 'blue'],
['Whats the beginning of the Alphabet'], ['A'],
['When its hot people usually like to eat what?', 'ice cream']  
];

var count = 0;  // users input that are correct
var response; // the responses from user
var correct = []; //answers correctly 
var wrong =[];//answers that are wrong


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

for ( var i = 0; i < questions.length; i += 1) {
  response = prompt(questions[i][0]);
  answer = questions[i][1];
    if ( response.toLowerCase() === answer.toLowerCase() ){
      count += 1;
      correct.push(questions[i][0]);
     } else {
      wrong.push(questions[i][0]);
     }
}



after the second question being asked, whatever the responses is..it says 'caught TypeError: Cannot read property 'toLowerCase' of undefined'

what am i doing wrong?

1 Answer

Hey Victor,

Check out line 3. You'll notice that you've separated the first string from the second. This is your problem. Compare this line to the other two questions, those work just fine.

['Whats the beginning of the Alphabet', 'A'],

Hope this helps.