1、基本语法
<p> This is simple stuff.</p>
//p为标签名，</p>是对应的结束标签
<!--anything except two adjacent dashes -->//注释2、HTML文档的标准结构
必须包含四组标签<html><head><title><body>
<!DOCTYPE html>
<html lang="en">
<meta charset ="utf-8" />
//斜杠表示它没有结束标签，开始标签和结束标签结合为一个标签下面是HTML文档的基本结构
<!DOCTYPE html>
<!-- File name and document purpose -->
<html lang="en">
<head>
<title> A title for the document </title>
<meta charset ="utf-8" />
...
</head>
<body>
...
</body>
</html>3、基本的文本标记
段落
<!DOCTYPE html>
<!-- greet.html
A trivial Document
-->
<html lang="en">
<head>
<title> our first document </title>
<meta charset ="utf-8" />
</head>
<body>
<p>
Greeting from your webmaster!
</body>
</html>换行：在要换行的文字后加上<br />
保留空白字符：用pre标签来指定
<pre>
Mary
had a
little
lamb
</pre>标题：一共有六级标题，<h1>,<h2>,<h3>,<h4>,<h5>,<h6>