HTML Text Formatting

### 使用HTML格式化文本
HTML提供了多个标签，你可以使用这些标签让网页上的某些文本以不同于普通文本的方式显示。例如，你可以使用``标签使文本加粗，使用``标签使文本倾斜，使用``标签突出显示文本，使用`<code>`标签显示一段计算机代码，使用`<ins>`和`<del>`标签标记编辑插入和删除的内容，等等。
以下示例展示了最常用的格式化标签的实际应用。现在，让我们来尝试一下，以了解这些标签的基本工作原理：

```html
This is bold text.
This is strongly important text.
This is italic text.
This is emphasized text.
This is highlighted text.
This is <code>computer code</code>.
This is smaller text.
This is subscript and superscript text.
This is <del>deleted text</del>.
This is <ins>inserted text</ins>.
```
默认情况下，``标签在浏览器中通常呈现为``，而``标签则呈现为``。然而，这两个标签的含义有所不同。
### Difference between &lt;strong&gt; and &lt;b&gt; tag

Both `` and `` tags render the enclosed text in a bold typeface by default, but the `` tag indicates that its contents have strong importance, whereas the `` tag is simply used to draw the reader's attention without conveying any special importance.

```html
WARNING! Please proceed with caution.
The concert will be held at Hyde Park in London.
```
### Difference between &lt;em&gt; and &lt;i&gt; tags

Similarly, both `` and `` tags render the enclosed text in italic type by default, but the `` tag indicates that its contents have stressed emphasis compared to surrounding text, whereas the `` tag is used for marking up text that is set off from the normal text for readability reasons, such as a technical term, an idiomatic phrase from another language, a thought, etc.

```html
Cats are cute animals.
The Royal Cruise sailed last night.
```
> Note: Use the `` and `` tags when the content of your page requires that certain words or phrases should have strong emphasis or importance. Also, in HTML5 the `` and `` tags have been redefined, earlier they don't have semantic meaning.

### Formatting Quotations
You can easily format the quotation blocks from other sources with the HTML `<blockquote>` tag.

Blockquotes are generally displayed with indented left and right margins, along with a little extra space added above and below. Let's try an example to see how it works:

```html
<blockquote>
 Learn from yesterday, live for today, hope for tomorrow. The important thing is not to stop questioning.
 <cite>— Albert Einstein</cite>
</blockquote>
```
> Tip: The cite tag is used to describe a reference to a creative work. It must include the title of that work or the name of the author (people or organization) or an URL reference.

For short inline quotations, you can use the HTML `<q>` tag. Most browsers display inline quotes by surrounding the text in quotation marks. Here's an example:

```html
According to the World Health Organization (WHO): <q>Health is a state of complete physical, mental, and social well-being.</q>
```
### Showing Abbreviations
An abbreviation is a shortened form of a word, phrase, or name.

You can use the `<abbr>` tag to denote an abbreviation. The title attribute is used inside this tag to provide the full expansion of the abbreviation, which is displayed by the browsers as a tooltip when the mouse cursor is hovered over the element. Let's try out an example:

```html
The <abbr title="World Wide Web Consortium">W3C</abbr> is the main international standards organization for the <abbr title="World Wide Web">WWW or W3</abbr>. It was was founded by Tim Berners-Lee.
```
### Marking Contact Addresses
Web pages often include street or postal addresses. HTML provides a special tag `<address>` to represent contact information (physical and/or digital) for a person, people or organization.

This tag should ideally used to display contact information related to the document itself, such as article's author. Most browsers display an address block in italic. Here's an example:

```html
<address>
Mozilla Foundation 
331 E. Evelyn Avenue 
Mountain View, CA 94041, USA
</address>
```
Please check out the HTML reference section for a complete list of HTML formatting tags.