HTML is a markup language used to structure web pages and define their content and presentation. It uses tags to mark elements like headings, paragraphs, lists, and more. CSS is used to style and lay out HTML elements, allowing separation of documentation structure and presentation. It helps make pages load faster, is easier to maintain globally, and has more styling options than HTML alone. CSS specifications are created and maintained by the W3C CSS Working Group and become recommendations when ratified.
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lesson-1-introduction-html-and-css.pptx
1. Diploma of computer science
Visioninternationalcollege
Html and Css
Lecturer: Yasir A. Mohamed
INTRODUCTION
Lesson 1
2. What is html
HTML stands for Hypertext Markup Language,
and it is the most widely used language to
write Web Pages.
Hypertext refers to the way in which Web
pages (HTML documents) are linked together.
3. Cont…
HTML is a Markup Language which means you
use HTML to simply "mark-up" a text
document with tags that tell a Web browser
how to structure it to display.
Now, HTML is being widely used to format web
pages with the help of different tags available
in HTML language.
6. CSS (Cascading Style Sheets)
CSS Stands for Cascading Style Sheets
CSS is a style sheet language used to
determine the formatting of an HTML
document.
7. Enter CSS (The timeline)
CSS1
December 1996
CSS 2
Became a W3C Recommendation in May 1998
CSS 3
CSS level 3 has been under development since December 15,
2005
8. Advantages of CSS
CSS saves time - You can write CSS once and
then reuse the same sheet in multiple
HTML pages.
Pages load faster - If you are using CSS,
you do not need to write HTML
tag attributes every time.
9. Advantages of CSS
Easy maintenance - To make a global change,
simply change the style, and all the elements
in all the web pages will be updated
automatically.
Superior styles to HTML - CSS has a much
wider array of attributes than HTML, so you
can give a far better look to your HTML page
in comparison to HTML attributes.
10. Who Creates and Maintains
CSS
CSS is created and maintained through a
group of people within the W3C called the
CSS Working Group. The CSS Working Group
creates documents called specifications.
When a specification has been discussed
and officially ratified by the W3C members,
it becomes a recommendation.
11. QUIZ 5 Marks
1. What is HTML?
2. What means the flowing?
o Hypertext
o markup language
3. Define css and what stands for?
4. What are the CSS Timelines?
5.List four advantage of CSS?
6. Who creates and maintanes CSS?
Each question carries one marks
One question is optional
