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

Posted by Andreas Schultze
Andreas Schultze
Courses Plus Student 3,951 Points

Doesnt fully work

Hi,

this is my solution. https://pastebin.com/va7EgET4

There is a problem which I can't solve. The correct answers always show 0. I don't know what I do wrong.

2 Answers

Aaron Loften
Aaron Loften
12,864 Points
Aaron Loften
Aaron Loften
12,864 Points

Hello! I solved it.

There are two problems. Both are with the "game" function. Common problems actually...

  1. You are declaring your correctAnswer variable inside of the loop, meaning it resets to 0 everytime you loop(every question).
  2. You are using a string for your correctAnswer variable so it is just appending a "1" to the string answer.

The following game function will work. :)

// Quiz Game
function game(array) {

  var correctAnswers = 0;
  for ( i = 0; i < 3; i += 1) {
    var userAnswer = prompt(array[i][0]).toLowerCase();
  if (userAnswer === array[i][1].toLowerCase() ){
    correctAnswers += 1;
    array[i].push(true);
  } else if (userAnswer !== array[i][1].toLowerCase()){
    array[i].push(false);
  }
    console.log('Correct answers count: ' + correctAnswers);
  }
document.write('<p>You correctly answered <strong>' + correctAnswers + '</strong> questions.</p>');
document.write('<p><strong>You answered the following questions correct:</strong></p>');
document.write('<ol>');
for ( i = 0; i < 3; i += 1) {
  if ( array[i][2] ) {
    document.write('<li>' + array[i][0] + '</li>');
  }
}
document.write('</ol>');
document.write('<p><strong>You ansered the following questions wrong:</strong></p>');
document.write('<ol>');
for ( i = 0; i < 3; i += 1) {
  if ( ! array[i][2] ) {
    document.write('<li>' + array[i][0] + '</li>');
  }
}
document.write('</ol>');
}
Andreas Schultze
PLUS
Andreas Schultze
Courses Plus Student 3,951 Points
Andreas Schultze
Andreas Schultze
Courses Plus Student 3,951 Points

Thank you very much. I totally understand what you mean. I should have known that if I declare it to 0 in the loop that it will always reset itself.

Thx and have a nice day!

Aaron Loften
Aaron Loften
12,864 Points

Eh, we all have done it. Part of being a developer is making mistakes and learning from them. :)

Have a great day!