Can someone critique my code?

// Counts the question answered correctly
//var correctQuestions = 0;

//Adds the right/wrong questions to their corresponding array.
var correctQuestionsArray = [];
var wrongQuestionsArray = [];

//2 dimensional array for questions
var questions = [
  ['Which language reminds you of a gem?', 'ruby'],
  ['Which language reminds you of a snake?', 'python'],
  ['Which language was facebook built on?', 'php'],
  ['Which language reminds you of coffee?', 'java'],
  ['Which language is used to style?', 'css']
];

//premade function to print on document
function print(message) {
  document.write(message);
}

//This for loop will itterate through the questions array
for (var i = 0; i < questions.length; i++) {
  var correctQuestionsString = '';
  var wrongQuestionsString = '';
  //Sets the answer typed by the user to a variable
  var answer = prompt(questions[i][0]);
  //sets a variable to the question
  var questionNumber = i + 1

  //Checks if the user input is equal to the question's answer
  if ( answer.toLowerCase() === questions[i][1] ) {
    //if equal add 1 to the question number so it starts at 1
    //questionNumber++;
    //add the question number, adds the question, and then adds the answer to variable
    correctQuestionsString +=  questionNumber + '. ' + questions[i][0] + ' <b>Answer: </b>' + questions[i][1] + '<br><br>';
    correctQuestionsArray.push(correctQuestionsString);

    //Adds 1 to the question counter
    //correctQuestions++;
    //if not equal
  } else {
    //it still adds 1 to the question number (I wanted the question number to be acurate)
    //questionNumber++;
    //add the question number, adds the question, and then adds the answer to variable
    wrongQuestionsString += questionNumber + '. ' + questions[i][0] + ' <b>Answer: </b>' + questions[i][1] + '<br><br>';
    wrongQuestionsArray.push(wrongQuestionsString);
  }
}

//prints a counter of how many questions you got right
print('<p>You got ' + correctQuestionsArray.length + ' question(s) right.</p>');
//prints the questions you got correct
print('<h4>You got these questions correct:</h4>');
print(correctQuestionsArray);
//prints the questions you got wrong
print('<h4>You got these questions wrong:</h4>');
print(wrongQuestionsArray);