HTML(Hypertext Markup Language) is the set of markup symbols(mean html tag) or codes inserted in a file intended for display on a World Wide Web browser page.
Cascading Style Sheets (CSS) are a stylesheet language used to describe the presentation of a document written in HTML.Over all its designing part for html document
For your simply capture HTML & CSS concept understand given below:
Fig:1 Difference Between CSS, HTML
Editor Install and setup
Go to Google=>then search "notepad++"=>then download the notepad++=>then install this=>Then open notepad++ to use
Fig:2 Download and installation of notepade++
Fig:3 save file .HTML formate
<html> <head> title and css file reference goes here........... </head> <body> main content goes here....... </body> </html>
<html> <head> <title>yoursite.com</title> </head> <body> <h1>This is a heading</h1> <h2>This is a heading</h2> <h3>This is a heading</h3> </body> </html>
In this above example <head> tag contain title of a webpage,link of css and link with js.Here is given that how title work into web-page.But in this basic course we doesnot discuss with <link> of css and <script> of js.Now we are only lear more basic concept.
Fig:4 Title of web-page
As per code:2 example there is three tag under <body>.This three tag is is header tag but there is total 6 header tag(h1,h2,h3,h4,h5,h6) in html but we have use 3 as example.In this h1 tag top most important header represent and h6 is the least important header.
Fig:5 heading tag