代码示例：

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title></title>
    </head>
    <body>
        <script>
            var a=1
            var n=1
            while(a<=10){
                n = n*a
                a++
            }
            console.log(n)            
            do {
                var b= prompt("你爱不爱我")
            }while(b !== "yes")
            alert("我也爱你")
        </script>
    </body>
</html>