console 命令行工具 X clear
console
<!DOCTYPE html> 
<html>
<head>
    <meta charset="utf-8" />
    <title></title>
    <script>
        for(var i=0;i<5;i++ )
        {
            document.write(i+"<br/>");
        }

         var str = ""; 
        for (var i = 100; i < 1000; i++)
        {
            var a = i % 10;             //提取个位数
            var b = (i / 10) % 10       //提取十位数
            b = parseInt(b);            //舍弃小数部分
            var c = i / 100;            //提取百位数
            c = parseInt(c);            //舍弃小数部分
            if (i == (a * a * a + b * b * b + c * c * c)) 
            {
                str = str + i + "、";
            }
         }
         document.write("水仙花数有：" + str);
</script>
</head>
<body>
</body>
</html>