编程狮在线代码实例

Tab
<>
""
''
()
{}
[]
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:
;
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,
.
$

输入

运行

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<!DOCTYPE html>
<html>
<head> 
<meta charset="utf-8"> 
<title>W3Cschool教程(w3cschool.cn)</title> 
</head>
<body>
​
<script>
var person;
var car="Volvo";
document.write(person + "<br>");
document.write(car + "<br>");
var car=""
document.write(car + "<br>");
</script>
​
</body>
</html>

实例代码

运行结果