How can attach css file with html file?

To attached css file in html is this way..you do this..

<link rel="stylesheet" href="style.css" type="text/css" media="screen" />

put this line in the header part and name the style.css according to yours

<link href="css/style.css" rel="stylesheet" type="text/css">

<link rel="stylesheet" href="style.css" type="text/css" media="screen" />

here is one way to do it

<linkrel="stylesheet" href="style.css" type="text/css" media="screen" />