my list won't come up

my ordered list won't come up I checked the console and nothing is there to say I have an error here is my code

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 <arr.length; i += 1) { listHTML +='<li>' + arr[1] + '</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);