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

Nicholas Wallen
Nicholas Wallen
12,278 Points

I copied his code exactly but no prompt pops up when I run it.

//two dimensional array

var questions = [ ['How old is Steve?', 27], ['How old is Trevor?', 29], ['How old is the baby?', 0] ];

//variable to hold how many correct answers var correctAnswers = 0; //random question variable var question; //random answer variable var answer; //random response variable var response; //random html variable var html;

//function to print the dialogue to the screen function print(message) { document.write(message); }

//for loop that cycles through each iteration in the array based upon the arrays length for ( var i = 0; i < questions.length; i += 1) { //question is grabbing the first column in the array question = questions[i][0]; //answer is grabbing the second column in the array answer = questions[i][1]; //response holds the users answer and parses it to make it an integer response = parseInt(prompt(question)); if (response === answer { correctAnswers += 1; }


html = "You got " + correctAnswers + " question(s) right."; print(html);

2 Answers

Hi Nicholas, it is quite hard to read your code like that. I would suggest you have a look a the Markdown Cheatsheet. It shows you how you can convert simple text to HTML. Neverthelesss, try this code this should help you:).

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 html;

function print(message) {

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;

html = "You got " + correctAnswers + " question(s) right."
Steven Parker
Steven Parker
229,657 Points

It's very difficult to tell the code from the comments without formatting, but it looks like there's a missing closing parenthesis after the word "answer" in this part:

  if (response === answer { correctAnswers += 1; }

In future questions, please use the instructions for code formatting in the Markdown Cheatsheet pop-up below the "Add an Answer" area. :arrow_heading_down:   Or watch this video on code formatting.