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

Posted by nicolabell
nicolabell
18,212 Points

I have followed his advise but the counter does not work - why?

/* The quiz always says I only have 1 question right, despite answering them correctly - any ideas why? */ var questions = [ ["How many legs does Nova have?", 4], ["How many legs does Rob have?", 2], ["How many legs does Nicola have?", 2] ];

var correctAnswers = 0; var question; var answer; var response; var html;

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

html = "You got " + correctAnswers + " question(s) correct!"; print(html);

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

2 Answers

Brodey Newman
Brodey Newman
10,962 Points
Brodey Newman
Brodey Newman
10,962 Points

Hey nicolabell,

I took a look at your code and noticed you aren't checking the responses inside of the for loop. If you drop your 'if' statement inside of your for loop to check the answers from the prompt and increment the correct answers accordingly, it will work. Below is what I did.

var questions = [["How many legs does Nova have?", 4], ["How many legs does Rob have?", 2], ["How many legs does Nicola have?", 2]];

var correctAnswers = 0;
var question;
var answer;
var response;
var html;

for ( var i = 0; i < questions.length; i += 1 ) {
  question = questions[i][0];
  answer = questions[i][1];
  response = parseInt(prompt(question));

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

html = "You got " + correctAnswers + " question(s) correct!";
print(html);

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

Hope this helps.

Jessica Secreto
Jessica Secreto
957 Points
Jessica Secreto
Jessica Secreto
957 Points

Try doing questions.length - 1 because the length is 3 and the index only goes up to 2. This worked for me! (Thanks Jason)