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Text Emphasis: Bold, Italic, Strikethrough & Highlights0%
Text Emphasis: Bold, Italic, Strikethrough & Highlights
Beginner12 min read•Updated: Jul 11, 2026
Emphasis styling allows you to highlight key terms, indicate deletions, or call attention to critical instructions. Markdown provides clean symbols that map directly to semantic HTML formatting tags.
Click to Zoom1. Bold Text (Strong Emphasis / <strong>)
To make text bold, surround it with two asterisks (`)** or **two underscores (__`)**:
This is **very important** information.
This is __also bold__ text.
- HTML Output:
<strong>very important</strong> - Best Practice: Prefer double asterisks (
**) because underscores inside words (likeuser_profile_name) can occasionally cause ambiguity in some parsers.
2. Italic Text (Emphasis / <em>)
To italicize text, surround it with a *single asterisk (`)** or **single underscore (_`)**:
This is *italicized* text.
This is _also italicized_ text.
- HTML Output:
<em>italicized</em>
3. Combining Bold and Italic (Bold-Italic)
To make text simultaneously bold and italic, surround it with three asterisks (``)*:
This is ***critically important and emphasized***.
- HTML Output:
<strong><em>critically important and emphasized</em></strong>
4. Strikethrough (GFM Extension / <del>)
In GitHub Flavored Markdown, surround text with double tildes (~~) to show crossed-out or deprecated content:
~~Deprecated: Use API v1~~
Now use API v2 for all new requests.
- Rendered Output: <del>Deprecated: Use API v1</del>
- HTML Output:
<del>Deprecated: Use API v1</del>
5. Highlights, Subscripts & Superscripts (Extended Markdown)
In extended flavors like Markdown Extra, Obsidian, and Pandoc:
| Style | Syntax | Example | Use Case |
|---|---|---|---|
| Highlight | ==text== | ==Crucial concept== | Study notes & revision |
| Subscript | ~text~ | H~2~O | Chemical formulas ($H_2O$) |
| Superscript | ^text^ | X^2^ + Y^2^ | Math exponents ($X^2$) |
Interactive Quiz
Multiple Choice Questions
Question 1
What syntax is used to create bold text in standard Markdown?
Question 2
Which HTML element is typically generated when you apply single asterisks (italic) in Markdown?
Question 3
How do you apply both bold and italic formatting simultaneously to a word?
Question 4
What is the GFM syntax for strikethrough text?
Question 5
Why is 'bold' generally preferred over '__bold__' by technical writers?
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Blockquotes, Nested Quotes & Callouts
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Related Lessons
| Previous Lesson | Next Lesson |
|---|---|
| Paragraphs, Line Breaks & Horizontal Rules | Blockquotes, Nested Quotes & Callouts |
Practice Quiz
Test your understanding of this lesson with 5 questions. Each question has one correct answer.