在我了解循环和数组是什么之前，我写了一个小型 JS 测验，现在我正试图将它整理一下。原始测验在警告窗口中向用户提问，如果他们回答不正确，它会告诉他们正确答案是什么。如果答案正确，它会告诉他们答案正确，然后再继续下一个问题。它还会记录用户答对或答错的次数。这是我的原始（过多）代码：

var correct = 0;

var answer1 = prompt("What is the capital of England?");
  if (answer1.toUpperCase() === "LONDON") {
    alert("That's correct!")
    correct += 1
  }
  else {
    alert("False. The correct answer is London.")
  }

var answer2 = prompt("What is the capital of France?")
   if (answer1.toUpperCase() === "PARIS") {
    alert("That's correct!")
    correct += 1
  }
  else {
    alert("False. The correct answer is Paris.");
  }

var answer3 = prompt("What is the capital of Canada?")
  if (answer3.toUpperCase() === "OTTAWA") {
    alert("That's correct!");
    correct += 1
  }
  else {
    alert("False. The correct answer is Ottawa.");
  }

document.write("<h1>You answered " + correct + " out of 5 questions correctly.</h1>")

if (correct === 5) {
  document.write("You won a gold star!");
}
  else if (correct >= 3) {
  document.write("You won a silver star.");
}

  else if (correct >= 2) {
  document.write ("You win third place.");
}

else {
  document.write("Sadly, you did not win any stars.");
}

如您所见，这非常长且很菜鸟。以下是我一直在努力重写的版本：

var questions = [
["What is the capital of England?", "LONDON"]
["What is the capital of France?", "PARIS"]
["What is the capital of Canada?", "OTTAWA"]
]

var correctAnswers = 0; 

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

我有点困惑的是正确答案的结构和位置，如果用户回答不正确，测验会在警告窗口中向用户显示这些答案。我是否需要向二维数组添加第三列，然后在 for 循环中引用它，即 correctResponse = [i][2]？或者我应该采用完全不同的方式来实现这一点？