HTML Entity for Euler Constant (ℇ)
What You'll Learn
How to display the Euler Constant (ℇ) in HTML using hexadecimal, decimal, and CSS escape methods. This character is U+2107 (EULER CONSTANT) in the Letterlike Symbols block (U+2100–U+214F)—a letterlike glyph used in mathematics and scientific notation (e.g. analysis, number theory).
Render it with ℇ, ℇ, or CSS escape \2107. There is no named HTML entity. Do not confuse ℇ with lowercase gamma γ (often used for the Euler–Mascheroni constant), the estimated symbol (℮), or the euro sign (€).
⚡ Quick Reference — Euler Constant
U+2107Letterlike Symbols
ℇHexadecimal reference
ℇDecimal reference
—Use numeric codes only
Name Value
──────────── ──────────
Unicode U+2107
Hex code ℇ
HTML code ℇ
Named entity (none)
CSS code \2107
Meaning Euler constant (letterlike symbol)
Related U+03B3 = Gamma (γ); U+212E = Estimated symbol (℮)Complete HTML Example
This example demonstrates the Euler Constant (ℇ) using hexadecimal code, decimal HTML code, and a CSS content escape. There is no named HTML entity for this symbol:
<!DOCTYPE html>
<html>
<head>
<style>
#point:after{
content: "\2107";
}
</style>
</head>
<body>
<p>Euler Constant using Hexadecimal: ℇ</p>
<p>Euler Constant using HTML Code: ℇ</p>
<p id="point">Euler Constant using CSS Entity: </p>
</body>
</html>🌐 Browser Support
The Euler Constant entity is universally supported in modern browsers:
👀 Live Preview
See the Euler constant letterlike symbol (ℇ) in math context and compared with gamma (γ):
🧠 How It Works
Hexadecimal Code
ℇ uses the Unicode hexadecimal value 2107 to display the Euler Constant. The x prefix indicates hexadecimal format.
Decimal HTML Code
ℇ uses the decimal Unicode value 8455 to display the same character.
CSS Entity
\2107 is used in CSS stylesheets, particularly in the content property of pseudo-elements like ::before and ::after.
Same visual result
All three methods produce the glyph: ℇ. Unicode U+2107 in the Letterlike Symbols block (U+2100–U+214F). No named HTML entity—use numeric codes in markup. Serve HTML as UTF-8.
Use Cases
The Euler Constant (ℇ) commonly appears in:
Display the Euler constant in equations, formulas, and mathematical text.
Limits, series, and analysis where the Euler constant appears.
Reference the Euler constant in number theory and related proofs.
Textbooks, courses, and tutorials teaching constant notation.
Scientific papers and technical documentation on the web.
Math wikis, constant reference pages, and notation guides.
💡 Best Practices
Do
- Use
ℇorℇfor readable Euler constant markup - Use math-friendly fonts (e.g. Cambria Math) for clear ℇ rendering
- Serve pages with UTF-8 (
<meta charset="utf-8">) - Add
aria-label(e.g. “Euler constant”) for accessibility - Provide context in formulas so readers know the symbol’s meaning
Don’t
- Confuse ℇ (letterlike) with γ (gamma) or ℮ (estimated symbol e-mark)
- Expect a named entity—none exists for U+2107
- Put CSS escape
\2107in HTML text nodes - Assume every font distinguishes ℇ and γ clearly
- Mix entity styles randomly in one file
Key Takeaways
Two HTML numeric references plus CSS render ℇ
ℇ ℇFor CSS stylesheets, use the escape in the content property
\2107Unicode U+2107 — EULER CONSTANT
Letterlike symbol for math and scientific notation
Three methods, no named HTML entity
❓ Frequently Asked Questions
ℇ (hex), ℇ (decimal), or \2107 in CSS content. There is no named entity.U+2107 (EULER CONSTANT). Letterlike Symbols block (U+2100–U+214F). Hex 2107, decimal 8455. Used in mathematical and scientific notation.ℇ or ℇ in markup, or \2107 in CSS.ℇ or ℇ) go in markup. The CSS escape \2107 is used in stylesheets, typically in the content property of pseudo-elements. Same visual result, different layers of the stack.Explore More HTML Entities!
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