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JavaScript JavaScript Loops, Arrays and Objects Tracking Multiple Items with Arrays Build a Quiz Challenge, Part 2 Solution

willkey
willkey
3,650 Points

I can't see what is wrong with my code

I am trying to complete the video JavaScript code, BUT i can't see why it's not working. (ps i have tried to add my code using a tip from a previous answer, so i hope it works)

var questions = [
  ['How many states are in the United States?', 50],
  ['How many continents are there?', 7],
  ['How many legs does an insect have?', 6]
];
var correctAnswers = 0;
var question;
var answer;
var response;
var correct = [];
var wrong = [];

function print(message) {
  var outputDiv = document.getElementById('output');
  outputDiv.innerHTML = message;
}

function buildList(arr) {
    var listHTML = '<ol>';
        for (var i = 0; i < array.length; i+= 1) {
            listHTML += '<li>' + arr[i] + '</li>';
        }
        listHTML += '</ol>';
        return listHTML;
    }

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

html = "You got " + correctAnswers + " question(s) right."
html += '<h2> You got these questions correct:</h2>';
html += buildList(correct);
html += '<h2> You got these questions wrong:</h2>';
html += buildList(wrong);
print(html);

2 Answers

Steven Parker
Steven Parker
229,982 Points

In the function "buildList", the parameter name is "arr", but the loop tries to reference "array.length" (and "array" is not defined).

willkey
willkey
3,650 Points

Thanks for that. I have now got the JavaScript code working.