语法错误：意外的标记 Else

Question

我正在通过 Codecademy 学习 Javascript，这里没有人被这个小作品难倒。

我应该写一个 if else 语句。

它在下面向我展示了缺少标识符的语法错误：

var userAnswer = prompt("Are you feeling lucky, punk?");

if (userAnswer === "yes");
{

    console.log("Batman hits you very hard. It's Batman and you're you! Of course Batman wins!");
}

 else {

    console.log("You did not say yes to feeling lucky. Good choice! You are a winner in the game of not getting beaten up by Batman.");
}

那有什么问题......这里的这个例子没有错误：

if (age < 18)

{

    console.log("We take no actions or responsibility. Play at your own risk!");
}

else

{

    console.log("Enjoy the game");
}

Answer 1

第一次条件检查后有分号。 另外，您应始终将条件分支的开头括号与括号放在同一行

Answer 2

if (userAnswer === "yes");

删除分号。

Answer 3

去掉后面的分号

if (userAnswer === "是");

如果你把分号放在那里，你是在告诉脚本停在那里而不是渲染下一个条件语句“else”[SyntaxError: Unexpected token else]

在此处输入图像描述

Answer 4

var age;
age = prompt('How old are you?');
if (age < 18)

{

alert("We take no actions or responsibility. Play at your own risk!");
}

else if(age > 18)

{

alert("Enjoy the game");
}