Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

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

Kieran Corcoran
Kieran Corcoran
11,188 Points

Build a Quiz Challenge, Part 1 Solution

Hi,

Can any tell me what might be wrong with this code. Does not appear to be converting the response toLowerCase method. If I remove that method it works fine but wonder why the toLowerCase method is causing an issue?

var score = 0;
var question;
var anwser;
var response;
var html;


var questions = [

  ['What is the capital of England', 'London'],
  ['What is the capital of Ireland', 'Dublin'],
  ['What is the capital of Wales', 'Cardiff']

];

for( var i = 0; i < questions.length; i++ ) {
     question = questions[i][0];
     anwser = questions[i][1];
     response = prompt(question);
     if( response.toLowerCase() === anwser ) {
        score += 1;
     }

}

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


html = 'You got ' + score + ' anwsers correct';

print(html);

2 Answers

Steven Parker
Steven Parker
220,415 Points

All of the answers are stored in mixed case (like "London"). So anything that is converted into lower case cannot match them.

But you're halfway there, now just change the stored answers to be lower case (like "london").

Siddharth Pande
Siddharth Pande
9,046 Points
function print(message) {
  document.write(message);
}

var questArray = [
  ["Which gas helps in burning?","OXYGEN"],
  ["Who is the incumbent Prime Minister of India?","NARENDRA MODI"],
  ["Which state is the Capital of India?","DELHI"]
];

//All the main code is in this function:
function quiz (array) { //array is a parameter where argument will be passed.
  var finalHtml = "<p>" //To produce the Html code

  /*To make the 
  wrong answer Html Code*/
  var wrongStr = "<h4>You got these questions wrong: </h4><ol>" 

  var correctAnswer = 0; // Counter for number of correct guesses

  // To Make the correct Answer Html Code
  var correctStr = "<h4> You got these questions correct: </h4><ol>";

  //Engine(loop) where questions are asked and answers are compared by iterating through the loop and using a decision making if statement.
  for(i=0; i < array.length; i += 1) {
    var guess = prompt(array[i][0]);
    if (guess.toUpperCase() === array[i][1]) {
      correctAnswer += 1;
      correctStr += "<li>" + array[i][0] + "</li>"
    } else {
      wrongStr += "<li>" + array[i][0] +"</li>"  
      }
  }

  //completing the Html code 
  finalHtml += "You got " + correctAnswer + 
  " question(s) right. </p> </br>" +
  correctStr + "</ol> </br>" + wrongStr + "</ol>"; 

  //Printing the final Html code on the document
  print(finalHtml);
}

quiz(questArray); //Run the Program