<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>if循环与switch case嵌套</title>
</head>
<body>
</body>
<script>
var a = window.prompt("请输入数字");
b = 0;
var i =parseInt(a);
switch(i){
case 10:
if(b>1){
document.write("aaaa");
}
else{
document.write("bbbb");
}
break;
case 11:
document.write("<pre>")
do{
document.write(b + "\n");
b++ ;
}while(b <= 99)
document.write("</pre>")
break;
case 12:
document.write("<pre>")
for(var c=0;c<=99;c++)
{
document.writeln(b);
b++;
}
document.write("</pre>")
break;
default:
document.write("开挂了你");
break;
}
</script>
</html>
…还是挺拗口的一个东西。
