console 命令行工具 X clear

console

    var $a=10;
    var a=3.14;
    var string="I am a string";
    var notDefined;
    var noSpace=null;

    document.write($a+"<br/>");
    document.write(a+"<br/>");
    document.write(string+"<br/>");
    document.write(notDefined+"<br/>");
    document.write(nospace+"<br/>");

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
</head>

<body>

<script>

</script>
</body>
</html>