UnicodeCharactercom
𝟏
U+1D7CF Β· MATHEMATICAL BOLD DIGIT ONE

Mathematical Bold Digit One

  • CodepointU+1D7CF
  • NameMATHEMATICAL BOLD DIGIT ONE
  • Decimal120783
  • BlockMathematical Alphanumeric Symbols (U+1D400–U+1D7FF)
  • Plane1 β€” Supplementary Multilingual Plane
  • ScriptCommon
  • CategoryNd β€” Decimal Number
  • Unicode version3.1 (2001)
  • Bidi classEN β€” European Number
  • Combining class0
  • East Asian widthN β€” Neutral
  • MirroredNo

About this character

U+1D7CF (𝟏) is MATHEMATICAL BOLD DIGIT ONE, a decimal digit 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+0031 1 (compatibility decomposition <font>). NFC and NFD leave it alone, but NFKC and NFKD replace it with U+0031 1. Search engines, identifier checks and username systems that apply NFKC will treat the two as the same text.

It has the decimal digit value 1.

How to type 𝟏

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Encodings & escapes

UTF-8 encoder β†’
UTF-8F0 9D 9F 8F4 bytes
UTF-16D835 DFCFsurrogate pair
UTF-320001D7CF4 bytes
HTML decimal&#120783;
HTML hex&#x1D7CF;
CSS\1D7CFin content: "…"
JavaScript\u{1D7CF}ES2015+
JavaScript\uD835\uDFCFsurrogate pair
JSON\uD835\uDFCF
Python\U0001D7CF
Python\N{MATHEMATICAL BOLD DIGIT ONE}by name
Java / C#\uD835\uDFCF
C / C++\U0001D7CFuniversal character name
Rust / Swift / PHP\u{1D7CF}
Go\U0001D7CF
Ruby\u{1D7CF}
Excel / Sheets=UNICHAR(120783)
URL-encoded%F0%9D%9F%8Fpercent-encoded UTF-8
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Normalization forms

Normalizer β†’
NFCunchanged
NFDunchanged
NFKCU+0031 1
NFKDU+0031 1
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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
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Nearby in Mathematical Alphanumeric Symbols

All in block β†’
U+1D7C9πŸ‰Mathematical Sans-Serif Bold Italic Pi Symbol U+1D7CA𝟊Mathematical Bold Capital Digamma U+1D7CBπŸ‹Mathematical Bold Small Digamma U+1D7CE𝟎Mathematical Bold Digit Zero U+1D7D0𝟐Mathematical Bold Digit Two U+1D7D1πŸ‘Mathematical Bold Digit Three U+1D7D2πŸ’Mathematical Bold Digit Four U+1D7D3πŸ“Mathematical Bold Digit Five U+1D7D4πŸ”Mathematical Bold Digit Six U+1D7D5πŸ•Mathematical Bold Digit Seven