提示不工作

Question

我的代码在 var myAge（第一行）某处有问题。我已加载浏览器，但无法获得打开提示 window。关于代码有什么问题的任何想法？

 <script>
var myAge = parseInt( prompt("enter your age", 30), 10 );

if (myAge >= 0 && myAge <= 10) {
    document.write("myAge is between 0 and 10 <br/>");
}

if ( !(myAge >= 0 && myAge <= 10) {
    document.write("myAge is NOT between 0 and 10 <br/>");  
}

if (myAge >= 80 || myAge <= 10) {
    document.write("myAge is 80 or above OR 10 or below.<br/>");    
}

if ( (myAge >= 30 && myAge <= 39) || (myAge >= 80 && myAge <= 89) ) {
    document.write("myAge is between 30 and 39 and 39 or myAge is " + "between 80 and 88"); 
}
</script>

Answer 1

你在 second-if 块中漏掉了一个括号......同时关闭脚本标签。

var myAge = parseInt( prompt("enter your age", 30), 10 );

if (myAge >= 0 && myAge <= 10) {
    document.write("myAge is between 0 and 10 <br/>");
}

if ( !(myAge >= 0 && myAge <= 10)) {
    document.write("myAge is NOT between 0 and 10 <br/>");  
}

if (myAge >= 80 || myAge <= 10) {
    document.write("myAge is 80 or above OR 10 or below.<br/>");    
}

if ( (myAge >= 30 && myAge <= 39) || (myAge >= 80 && myAge <= 89) ) {
    document.write("myAge is between 30 and 39 and 39 or myAge is " + "between 80 and 88"); 
}

提示不工作

Prompt not working

javascript

window

prompt