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

Nikola Jankovic
Nikola Jankovic
10,793 Points
Posted by Nikola Jankovic
Nikola Jankovic
10,793 Points

[SOLVED] Why with my for loop NaN apires?

var questions= [
  ['Koliko Nikola Ima godina?', 26],
  ['Koliko Svetlana ima godina?', 27],
  ['Koliko je 2+2?', 4]
];

var answer;
var ask;
var correctAnswer;

var correct= 0;
var wrong= 0;

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

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

print ('You have '+correctAnswer+' correct answers!');
Jason Anello
Jason Anello
Courses Plus Student 94,610 Points

Hi Nikola,

Glad you figured it out on your own.

It could be helpful to other students if you post your solution to the problem as an answer here.

For the time being, I'll update the title to indicate that it's solved.

1 Answer

Nikola Jankovic
Nikola Jankovic
10,793 Points
Nikola Jankovic
Nikola Jankovic
10,793 Points

* appear- Sorry for the spelling mistake. This variable need to have value 0 var correctAnswer= 0; and when we run the loop we ad +1 every time the answer is correct.

Jason Anello
Jason Anello
Courses Plus Student 94,610 Points

marked as Best Answer

Thanks for coming back and leaving your solution.