π is the Unicode emoji BOOKS, code point U+1F4DA (decimal 128218) in the Miscellaneous Symbols and Pictographs block, added in Unicode 6.0. In HTML write 📚, and in UTF-8 it is the 4 bytes F0 9F 93 9A.
Codes
| Where | How to write it |
|---|---|
| Code point | U+1F4DA |
| Decimal | 128218 |
| UTF-8 bytes | F0 9F 93 9A |
| UTF-16 (big-endian) | D83D DCDA |
| UTF-32 | 0001F4DA |
| HTML decimal | 📚 |
| HTML hex | 📚 |
| CSS | \1F4DA |
| JavaScript | \u{1F4DA} or \uD83D\uDCDA |
| JSON | \uD83D\uDCDA |
| Python | \U0001F4DA |
| Python by name | \N{BOOKS} |
| Java, C# | \uD83D\uDCDA |
| Rust, Swift | \u{1F4DA} |
| Go, C, C++ | \U0001F4DA |
| URL (percent-encoded) | %F0%9F%93%9A |
JavaScript and JSON strings store text as UTF-16, so this character takes two code units (a surrogate pair) and "π".length is 2. Python 3 strings count code points, so its length there is 1.
Properties
| Property | Value |
|---|---|
| Name | BOOKS |
| Emoji name | books |
| Code point | U+1F4DA (decimal 128218) |
| Block | Miscellaneous Symbols and Pictographs (U+1F300βU+1F5FF) |
| General category | So: Other symbol |
| Script | Common |
| Bidirectional class | ON: Other neutral |
| Mirrored in right-to-left text | No |
| First in Unicode version | 6.0 |
Nearby in Miscellaneous Symbols and Pictographs
- π U+1F4D2 Ledger
- π U+1F4D3 Notebook
- π U+1F4D4 Notebook with decorative cover
- π U+1F4D5 Closed book
- π U+1F4D6 Open book
- π U+1F4D7 Green book
- π U+1F4D8 Blue book
- π U+1F4D9 Orange book
- π U+1F4DB Name badge
- π U+1F4DC Scroll
- π U+1F4DD Memo
- π U+1F4DE Telephone receiver
- π U+1F4DF Pager
- π U+1F4E0 Fax machine
- π‘ U+1F4E1 Satellite antenna
- π’ U+1F4E2 Loudspeaker
All 768 characters: Miscellaneous Symbols and Pictographs.
Official reference
Questions people ask
- What is the HTML code for π?
- Use 📚 (decimal) or 📚 (hex).
- What is the UTF-8 encoding of U+1F4DA?
- F0 9F 93 9A (hex), 4 bytes. In a URL it is %F0%9F%93%9A.
- How do I write U+1F4DA in JavaScript or Python?
- JavaScript: \u{1F4DA} or \uD83D\uDCDA. Python: \U0001F4DA.
Source
Unicode Character Database 18.0.0 (Unicode License v3) and the Unicode emoji test data; HTML entity names from the WHATWG HTML Standard (CC BY 4.0). The encodings above are computed from the code point and checked against Python's encoders. How the character looks depends on your fonts.
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