What is HTML

Introduction

HTML is the language that tells a web browser how to show a webpage. It gives structure to the content you see on the internet.

When you want to create a webpage to share information.

When you need to add text, images, or links to a website.

When you want to build the basic layout of a website before adding styles or interactivity.

When you want to make content readable by browsers and accessible to everyone.

When you want to organize content into headings, paragraphs, lists, and sections.

Syntax

HTML

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8">
    <title>Page Title</title>
  </head>
  <body>
    <!-- Your content goes here -->
  </body>
</html>

The <!DOCTYPE html> tells the browser this is an HTML5 document.

The <html> tag wraps all the content on the page.

Examples

Use the <p> tag to add a paragraph of text.

HTML

<p>This is a paragraph.</p>

The <h1> tag creates a main heading.

HTML

<h1>Welcome to my website</h1>

The <a> tag creates a clickable link.

HTML

<a href="https://example.com">Visit Example</a>

Sample Program

This simple webpage shows a heading, a paragraph, and a link. It uses basic HTML tags and includes accessibility with an aria-label on the link.

HTML

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Simple HTML Page</title>
</head>
<body>
  <h1>Hello, World!</h1>
  <p>This is my first webpage using HTML.</p>
  <a href="https://www.example.com" aria-label="Example website link">Go to Example.com</a>
</body>
</html>

Important Notes

Always include the lang attribute in the <html> tag to help screen readers.

Use semantic tags like <h1>, <p>, and <a> to organize content clearly.

Test your HTML in a browser to see how it looks and works.

Summary

HTML is the building block of webpages, giving structure to content.

It uses tags like <h1>, <p>, and <a> to organize text and links.

Every webpage starts with a basic HTML structure including <!DOCTYPE html> and <html> tags.

Practice

1. What is the main purpose of HTML in web development?

easy

A. To add interactive behavior to webpage elements

B. To style the colors and fonts of a webpage

C. To give structure and organize content on a webpage

D. To store data in a database

Solution

1. Step 1: Understand HTML's role

   HTML is used to create the structure of a webpage by organizing text, images, and links.

2. Step 2: Differentiate from other technologies

   Styling is done by CSS, behavior by JavaScript, and data storage by databases, not HTML.

3. Final Answer:

   To give structure and organize content on a webpage -> Option C

4. Quick Check:

   HTML = Structure [OK]

Hint: HTML structures content, CSS styles it, JS adds behavior [OK]

Common Mistakes:

• Confusing HTML with CSS or JavaScript
• Thinking HTML stores data
• Believing HTML controls webpage behavior

2. Which of the following is the correct way to start an HTML document?

easy

A.

B. <html5>

C. <document>

D. <start>

Solution

1. Step 1: Identify the standard HTML declaration

   The correct way to declare an HTML5 document is with <!DOCTYPE html> at the top.

2. Step 2: Recognize invalid tags

   Tags like <html5>, <document>, and <start> are not valid HTML tags.

3. Final Answer:

   <!DOCTYPE html> -> Option A

4. Quick Check:

   HTML5 starts with <!DOCTYPE html> [OK]

Hint: HTML documents start with [OK]

Common Mistakes:

• Using <html5> instead of
• Starting with non-standard tags
• Omitting the doctype declaration

3. What will the browser display when rendering this HTML snippet?

<h1>Welcome</h1>
<p>This is a paragraph.</p>

medium

A. A heading saying 'Welcome' and a paragraph saying 'This is a paragraph.'

B. Only the heading 'Welcome' with no paragraph

C. Only the paragraph 'This is a paragraph.' with no heading

D. The raw HTML code as text

Solution

1. Step 1: Understand HTML tags used

   The <h1> tag creates a large heading, and <p> creates a paragraph.

2. Step 2: Predict browser rendering

   The browser shows the heading text 'Welcome' prominently and below it the paragraph text 'This is a paragraph.'

3. Final Answer:

   A heading saying 'Welcome' and a paragraph saying 'This is a paragraph.' -> Option A

4. Quick Check:

   <h1> + <p> = Heading + Paragraph [OK]

Hint: Tags like <h1> and <p> show heading and paragraph [OK]

Common Mistakes:

• Expecting raw HTML code to display
• Thinking only one tag will render
• Confusing tag effects

4. Identify the error in this HTML snippet:

<html>
<head>
<title>My Page</title>
</head>
<body>
<h1>Hello World</h2>
</body>
</html>

medium

A. The <html> tag is misspelled

B. The <title> tag is missing

C. The <body> tag is not closed

D. The closing tag for the heading is incorrect

Solution

1. Step 1: Check matching tags

   The heading starts with <h1> but closes with </h2>, which is incorrect.

2. Step 2: Verify other tags

   The <title>, <body>, and <html> tags are correctly used and closed.

3. Final Answer:

   The closing tag for the heading is incorrect -> Option D

4. Quick Check:

   Matching tags must open and close the same [OK]

Hint: Opening and closing tags must match exactly [OK]

Common Mistakes:

• Mismatched opening and closing tags
• Forgetting to close tags
• Misspelling tag names

5. You want to create a simple webpage with a title, a heading, and a paragraph. Which is the correct minimal HTML structure to do this?

hard

A.
<head>
Page Title

Heading
Paragraph text.

B.

Page Title

Heading
Paragraph text.

C.

Heading
Page Title

Paragraph text.

D.

Page Title

Heading
Paragraph text.

Solution

1. Step 1: Check for required document parts

   The document must start with <!DOCTYPE html>, have <html>, <head> with <title>, and <body> for content.

2. Step 2: Verify correct tag placement

   Head contains metadata like title; body contains visible content like heading and paragraph. <!DOCTYPE html> <html> <head> <title>Page Title</title> </head> <body> <h1>Heading</h1> <p>Paragraph text.</p> </body> </html> follows this structure correctly.

3. Final Answer:

   <!DOCTYPE html> <html> <head> <title>Page Title</title> </head> <body> <h1>Heading</h1> <p>Paragraph text.</p> </body> </html> -> Option B

4. Quick Check:

   DOCTYPE + head + body = valid HTML page [OK]

Hint: Always include DOCTYPE, head with title, and body for content [OK]

Common Mistakes:

• Placing content inside <head> instead of <body>
• Omitting DOCTYPE declaration
• Not closing tags properly