HTML

The language for building web pages.

            <h1>  Hello world  </h1>

CSS

The language for styling web pages

#abc {
  color: 'red';
  display: 'block';
  position: 'relative'; 
  background: 'red';
  font-size: '16px';
          }

The language for programming web pages

var object = {
  name: 'Foo',
  type: 'Bar',
  location: 'Earth',
  properties:['Javascript',
              'HTML'];
          };

A popular programming language

x="Hello"
y="World"
x=456
print (x) 
print (y)
print (z)

A web server programming language

$a="Hello";
$b="World";
$c=456;
echo $a;
echo $b;
echo $c;

A language for accessing databases

SELECT column1, column2, 
column3, column4 FROM table_name

A JS library for developing web pages

$(document).ready(function(){
$("p").click(function(){
$(this).hide();
});
});