为什么在浏览器中输入一段代码提示？

Question

我正在为树屋做出挑战，叫做＃34;建立一个测验＆＃34;。我必须创建问题，并根据用户的答案，我应该显示他/她有正确和错误的问题。我现在特别挣扎的是理解为什么下面的javascript代码不会至少提出我的一个问题。 任何见解将不胜感激。

   // Questions
var questions = [
            ['Who is the President of the U.S?', 'Donald Trump'],
            ['Who is the Vice President of the U.S?', 'Mike Pence'],
            ['Who won the Super Bowl last year?', 'Patriots']
];

//Variables go here, answer, response, question ect
var correctAnswers = 0;
var question;
var answer;
var response;
var html;

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

    //below is how you loop the questions above 
for (var i = 0; i < questions.length; i += 1); {
    question = questions[i][0];
    answer = questions[i][1];
    response = window.prompt(question);
    if (response === answer) {
        correctAnswers += 1;
    }
}

html = "you got" + correctAnswers + "question(s) right.";
print(html);

Answer 1

＆＃34;＆＃34;＆＃34;＆＃34;中有一个流浪的分号。循环表达式的右括号和代码块的左括号之间的循环。