AES Encryption Explained: How It Works and Why It Matters
Jun 23, 2026
HTML Entity Detail
HTML Entity - Iota
Iota is a uppercase Greek alphabet letters used in mathematics, science, and engineering. This HTML entity enables web developers to display this character reliably across all browsers without encoding issues.
Symbol preview
Ι
Unicode
U+0399;
HTML entity
Ι
CSS code
\0399
Usage Examples
Use this HTML entity in mathematical and scientific notation. For example, Σ for summation, Π for product, Δ for difference.
Common Mistakes
⚠️
Mistake: Using Latin capital letters instead of Greek letters in formulas
Fix: Greek letters have specific mathematical meanings. Use Σ not S for summation, Π not P for product, Δ not D for change. The meaning changes if you use the wrong alphabet.
⚠️
Mistake: Confusing uppercase Greek letters that look like Latin letters
Fix: Capital alpha (Α) looks like A, capital beta (Β) looks like B, etc. Use Latin letters for Latin text and Greek letters for Greek/math context — they may be different Unicode characters.
Iota
Select any code to highlight it before copying.
Category: Greek Alphabet - Capital Letters
| Unicode | U+0399; |
|---|---|
| Hex Code | Ι |
| HTML Code | Ι |
| HTML Entity | Ι |
| CSS Code | \0399 |
| Windows Shortcut | |
| Mac Shortcut | |
HTML code example
CSS code example
Last updated: 21 Jun 2026
Blog
Latest from Our Blog
CSS Gradient Generator: Create Stunning Gradients for Your Website
Jun 23, 2026
Diff Checker: How to Compare Text and Files Effectively
Jun 23, 2026
JSON Validation: How to Validate and Fix JSON Data
Jun 23, 2026
Regex Testing: How to Test and Debug Regular Expressions
Jun 23, 2026
SSL Certificate Checker: How to Verify SSL/TLS Certificates Online
Jun 23, 2026