π is the Unicode character MATHEMATICAL ITALIC PHI SYMBOL, code point U+1D719 (decimal 120601) in the Mathematical Alphanumeric Symbols block, added in Unicode 3.1. In HTML write 𝜙, and in UTF-8 it is the 4 bytes F0 9D 9C 99.
Codes
| Where | How to write it |
|---|---|
| Code point | U+1D719 |
| Decimal | 120601 |
| UTF-8 bytes | F0 9D 9C 99 |
| UTF-16 (big-endian) | D835 DF19 |
| UTF-32 | 0001D719 |
| HTML decimal | 𝜙 |
| HTML hex | 𝜙 |
| CSS | \1D719 |
| JavaScript | \u{1D719} or \uD835\uDF19 |
| JSON | \uD835\uDF19 |
| Python | \U0001D719 |
| Python by name | \N{MATHEMATICAL ITALIC PHI SYMBOL} |
| Java, C# | \uD835\uDF19 |
| Rust, Swift | \u{1D719} |
| Go, C, C++ | \U0001D719 |
| URL (percent-encoded) | %F0%9D%9C%99 |
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 | MATHEMATICAL ITALIC PHI SYMBOL |
| Code point | U+1D719 (decimal 120601) |
| Block | Mathematical Alphanumeric Symbols (U+1D400βU+1D7FF) |
| General category | Ll: Lowercase letter |
| Script | Common |
| Bidirectional class | L: Left-to-right |
| Mirrored in right-to-left text | No |
| First in Unicode version | 3.1 |
Decomposition
MATHEMATICAL ITALIC PHI SYMBOL has a compatibility decomposition (font) to the sequence below. NFKC and NFKD normalisation replace it with that sequence, which can change how text looks, so use them for search, not for storage.
Nearby in Mathematical Alphanumeric Symbols
- π U+1D711 Mathematical Italic Small Phi
- π U+1D712 Mathematical Italic Small Chi
- π U+1D713 Mathematical Italic Small Psi
- π U+1D714 Mathematical Italic Small Omega
- π U+1D715 Mathematical Italic Partial Differential
- π U+1D716 Mathematical Italic Epsilon Symbol
- π U+1D717 Mathematical Italic Theta Symbol
- π U+1D718 Mathematical Italic Kappa Symbol
- π U+1D71A Mathematical Italic Rho Symbol
- π U+1D71B Mathematical Italic Pi Symbol
- π U+1D71C Mathematical Bold Italic Capital Alpha
- π U+1D71D Mathematical Bold Italic Capital Beta
- π U+1D71E Mathematical Bold Italic Capital Gamma
- π U+1D71F Mathematical Bold Italic Capital Delta
- π U+1D720 Mathematical Bold Italic Capital Epsilon
- π‘ U+1D721 Mathematical Bold Italic Capital Zeta
All 997 characters: Mathematical Alphanumeric Symbols.
Official reference
Questions people ask
- What is the HTML code for π?
- Use 𝜙 (decimal) or 𝜙 (hex).
- What is the UTF-8 encoding of U+1D719?
- F0 9D 9C 99 (hex), 4 bytes. In a URL it is %F0%9D%9C%99.
- How do I write U+1D719 in JavaScript or Python?
- JavaScript: \u{1D719} or \uD835\uDF19. Python: \U0001D719.
Source
Unicode Character Database 18.0.0 (Unicode License v3); 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.
Legal entity
Devansh Yadav
Moradabad, Uttar Pradesh
Governing law: Courts at Moradabad, Uttar Pradesh
Phone: +91 8433475698
Legal: legal@analyzeit.in