Summary HTML - Computer science

HTML (HyperText Markup Language) is the standard language used to create and design documents on the World Wide Web. Here are some key concepts and
elements of HTML theory:



Basic Concepts



1. **Markup Language**: HTML is a markup language, which means it uses tags to annotate text. These annotations tell the browser how to display the
content.

2. **Elements and Tags**: HTML consists of elements represented by tags. Tags are enclosed in angle brackets (`< >`). Most elements have an opening tag
and a closing tag, with content in between.

- Example: `<p>This is a paragraph.</p>`

3. **Attributes**: Tags can have attributes, which provide additional information about the element. Attributes are included in the opening tag.

- Example: `<a href="https://example.com">Link</a>`



Structure of an HTML Document



An HTML document typically includes the following basic structure:



```html

<!DOCTYPE html>

<html lang="en">

, <head>

<meta charset="UTF-8">

<title>Document Title</title>

</head>

<body>

<h1>Heading</h1>

<p>Paragraph of text.</p>

</body>

</html>

```



- `<!DOCTYPE html>`: Declares the document type and version of HTML.

- `<html>`: The root element that contains the entire HTML document.

- `<head>`: Contains meta-information about the document (e.g., title, character set).

- `<body>`: Contains the content of the document, such as text, images, links, etc.



Common HTML Elements



1. **Headings**: Represented by `<h1>` to `<h6>`, where `<h1>` is the highest level heading, and `<h6>` is the lowest.

- Example: `<h1>Main Heading</h1>`