UnicodeCharactercom
𝐼
U+1D43C Β· MATHEMATICAL ITALIC CAPITAL I

Mathematical Italic Capital I

  • CodepointU+1D43C
  • NameMATHEMATICAL ITALIC CAPITAL I
  • Decimal119868
  • BlockMathematical Alphanumeric Symbols (U+1D400–U+1D7FF)
  • Plane1 β€” Supplementary Multilingual Plane
  • ScriptCommon
  • CategoryLu β€” Uppercase Letter
  • Unicode version3.1 (2001)
  • Bidi classL β€” Left-to-Right
  • Combining class0
  • East Asian widthN β€” Neutral
  • MirroredNo

About this character

U+1D43C (𝐼) is MATHEMATICAL ITALIC CAPITAL I, an uppercase letter in the Mathematical Alphanumeric Symbols block. Its script is Common: it is shared by many writing systems rather than belonging to one. It was added in Unicode 3.1 (2001).

It is a font variant of U+0049 I (compatibility decomposition <font>). NFC and NFD leave it alone, but NFKC and NFKD replace it with U+0049 I. Search engines, identifier checks and username systems that apply NFKC will treat the two as the same text.

How to type 𝐼

Β§

Encodings & escapes

UTF-8 encoder β†’
UTF-8F0 9D 90 BC4 bytes
UTF-16D835 DC3Csurrogate pair
UTF-320001D43C4 bytes
HTML decimal&#119868;
HTML hex&#x1D43C;
CSS\1D43Cin content: "…"
JavaScript\u{1D43C}ES2015+
JavaScript\uD835\uDC3Csurrogate pair
JSON\uD835\uDC3C
Python\U0001D43C
Python\N{MATHEMATICAL ITALIC CAPITAL I}by name
Java / C#\uD835\uDC3C
C / C++\U0001D43Cuniversal character name
Rust / Swift / PHP\u{1D43C}
Go\U0001D43C
Ruby\u{1D43C}
Excel / Sheets=UNICHAR(119868)
URL-encoded%F0%9D%90%BCpercent-encoded UTF-8
Β§

Normalization forms

Normalizer β†’
NFCunchanged
NFDunchanged
NFKCU+0049 I
NFKDU+0049 I
Β§

Looks similar

Characters that Unicode’s security data (UTS #39 confusables) lists as visually confusable with this one. Useful for spotting lookalike spoofing in URLs and usernames.

U+00311Digit One U+0049ILatin Capital Letter I U+006ClLatin Small Letter L U+007C|Vertical Line U+0196Ζ–Latin Capital Letter Iota U+01C0Η€Latin Letter Dental Click U+0399Ξ™Greek Capital Letter Iota U+0406Π†Cyrillic Capital Letter Byelorussian-Ukrainian I U+04C0Σ€Cyrillic Letter Palochka U+05C0Χ€Hebrew Punctuation Paseq U+05D5Χ•Hebrew Letter Vav U+05DFןHebrew Letter Final Nun U+0627Ψ§Arabic Letter Alef U+0661Ω‘Arabic-Indic Digit One U+06F1Ϋ±Extended Arabic-Indic Digit One U+16C1ᛁRunic Letter Isaz Is Iss I
Β§

Nearby in Mathematical Alphanumeric Symbols

All in block β†’
U+1D436𝐢Mathematical Italic Capital C U+1D437𝐷Mathematical Italic Capital D U+1D438𝐸Mathematical Italic Capital E U+1D439𝐹Mathematical Italic Capital F U+1D43A𝐺Mathematical Italic Capital G U+1D43B𝐻Mathematical Italic Capital H U+1D43D𝐽Mathematical Italic Capital J U+1D43E𝐾Mathematical Italic Capital K U+1D43F𝐿Mathematical Italic Capital L U+1D440𝑀Mathematical Italic Capital M U+1D441𝑁Mathematical Italic Capital N U+1D442𝑂Mathematical Italic Capital O