What is CSS?

• CSS is abbreviation of Cascading Style Sheets.
• CSS Styles define how HTML element should display.
• CSS is a key component when developing a large website, building a website without CSS is very hard and time consuming work.
•  CSS introduced with HTML 4.0
• External Style sheets reduce lot of works and it stored in .css files.

Code sample:

h1
{
color:blue;

text-align:center;

background-color:#DDDDD5; 
}
p
{
font-family:"Arial";
color:green;  
font-size:18px;
background-color:#CFCFCF;   
}
div
{
background-color:GreenYellow;
color:red;
}

After applying about code to HTML the output will look like this:


CSS is most useful when creating a large scale websites it will reduce work load. Some HTML elements have same formatting and some same formatted elements should repeat again and again, if we need to change a format it should change all the places of source code it will consume lot of time.