css class attribute

1.myclass {
2  border:1px solid black;
3  background-color: #d2d2d2;
4  height:20px;
5  width:60px;
6}
7/*If you give this class to a div in html, it will get the styles you gave
8to that class. You can add multiple classes to a div, and multiple divs
9can get that class. */
10/* I hope I helped! */

1<p class="ThisIsAClassName">HI</p>

1<h1 class="Class">Content</h1>
2<h1 id="id">Content</h1>
3Css: 
4.class
5#id

1<h1 class="write a name">H1 content</h1>

1<!-- in the head element -->
2<style> h1 { color:blue; } </style>
3
4<!-- in the body element -->
5<h1> text in blue because all "h1" element is in blue </h1>