Check out example codes for "css html". It will help you in understanding the concepts better.

Code Example 1

<link rel="stylesheet" href="PathToYourFile.css">

Code Example 2

Three ways to add CSS to the body of html:
	1)External CSS
	2)Internal CSS
	3)Inline CSS

1) Externally:  
    Type your css code in a file. Remember you file name.
	Then,
<head>
	<link rel="stylesheet" type="text/css" href="FileName.css" >
</head>

2) Internally:
	Type your cSS in the html file itself. (It is not preffered until
	little CSS code is to be added). This can be done by style tag.
	Example:
	<head>
	<style>
	h1 {
      text-color:red;
      text-size: 0.8em;
    }
    </style>
	</head>

3) Inline:
	This method is not used by developers as it is very lengthy and
	maintaining code becomes difficult.
	Example:
   <h1 style="color:blue;text-align:center;">Header file</h1>

Code Example 3

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

Code Example 4

<p style="color: blue; font-size: 46px;">

Code Example 5

<html>
	<head>
	  <!-- import external css file -->
	  <link rel="stylesheet" type="text/css" href="file.css" />
	  <!-- internal css -->
	  <style>
		h1 {
			color: red;
		}
	  </style>
	</head>
	<body>
	  <!-- inline css -->
	  <h1 style="color: red;">hello world</h1>
	</body>
</html>

Code Example 6

/* Answer to: "link to css" */
<head>
  <link rel="stylesheet" type="text/css" href="yourcss.css">
</head>

Learn ReactJs, React Native from akashmittal.com