console 命令行工具 X clear

console

var score=prompt("请输入考试成绩")/1;
console.log(score+","+typeof(score));
if(score >100||score<0||isNaN(score)){
    alert("输入错误，拖出去斩了~"+score);
}else {
    if(score==100){
    alert("车，拿去~");
}else if(score>80){
    alert("手机，那去玩~");
}else if(score>60){
    alert("书，那去看~");
}else{
    alert("给你一顿胖揍~~");
    }
}

<html>
    <head></head>
    <body></body>
    
</html>