Question

我是Javascript的新手，我正在学习switch语句。我的代码试图运行两层switch语句和验证数据。我想要的输出是让用户输入YES或NO，如果选择YES，那么它将通过switch语句，但是如果选择YES以外的任何东西，那么它将输出“Too Bad！”。到控制台。我有编译器错误，我不知道如何解决这个问题因为我没有完全理解javascript语法。

var user = prompt("Welcome to learning about exceptions with me, A-rod. 
In this tutorial we will be learning about exceptions and what not 
to do with them. Let's get started, shall we? ").toUpperCase(); 

switch(user){
    case 'YES'
     var user_1 = prompt("What's your name?"); 
     switch(user_1) {
        case 'Buster':
            console.log("Hey, brother!");
            break;
        case 'Alex':
            console.log("I've made a huge mistake.");
            break;
        case 'Steve':
            console.log("Steve Holt!");
            break;
     default:
         console.log("I don't know you!");}
break; 
default:
    console.log("too bad!"); 
 }

错误是

“期待'：'代替'var'”

和

“期待'（结束）'而不是'默认'”

Answer 1

var user = prompt("Welcome to learning about exceptions with me, A-rod." + 
"In this tutorial we will be learning about exceptions and what not" +  
"to do with them. Let's get started, shall we? ").toUpperCase(); 

switch(user){
    case 'YES':
     var user_1 = prompt("What's your name?"); 
     switch(user_1) {
        case 'Buster':
            console.log("Hey, brother!");
            break;
        case 'Alex':
            console.log("I've made a huge mistake.");
            break;
        case 'Steve':
            console.log("Steve Holt!");
            break;
     default:
         console.log("I don't know you!");
         break;
     }
break;
default:
    console.log("too bad!"); 
    break;
 }

Answer 2

您的第一个switch语句缺少分号：

var user = prompt("Welcome to learning about exceptions with me, A-rod. In this tutorial we will be learning about exceptions and what not to do with them. Let's get started, shall we? ").toUpperCase(); 

switch(user){
    case 'YES':
     var user_1 = prompt("What's your name?"); 
     switch(user_1) {
        case 'Buster':
            console.log("Hey, brother!");
            break;
        case 'Alex':
            console.log("I've made a huge mistake.");
            break;
        case 'Steve':
            console.log("Steve Holt!");
            break;
     default:
         console.log("I don't know you!");}
break; 
default:
    console.log("too bad!"); 
 }

Javascript嵌套切换语句

2 个答案: