∅
U+2205 EMPTY SET
Mathematical Operators · Math symbol
| Name | EMPTY SET |
|---|---|
| Code point | U+2205 |
| Decimal | 8709 |
| Block | Mathematical Operators |
| Category | Math symbol (Sm) |
| UTF-8 | E2 88 85 |
| UTF-16 | 2205 |
| UTF-32 | 00002205 |
| HTML | ∅ ∅ ∅ |
| CSS | \2205 |
| JavaScript | \u2205 |
| Python | \u2205 |
| URL-encoded | %E2%88%85 |
Frequently asked questions
What is the character U+2205?
U+2205 ∅ is officially named EMPTY SET. It belongs to the Mathematical Operators block and the category Math symbol.
How do I type ∅?
Windows (Word, WordPad): type 2205, then press Alt+X. Linux (GTK/IBus): Ctrl+Shift+U 2205, then Space. macOS: enable the “Unicode Hex Input” keyboard, hold Option and type 2205. Or simply copy it from this page.
How do I write ∅ in HTML?
As a numeric character reference ∅ (decimal) or ∅ (hexadecimal). In UTF-8 documents you can also insert the character directly. There is also the named entity ∅.
How is ∅ encoded in UTF-8?
In UTF-8 the character takes 3 bytes: E2 88 85. In UTF-16: 2205.