UnicodeCharactercom
⅀
U+2140 · DOUBLE-STRUCK N-ARY SUMMATION

Double-Struck N-Ary Summation

  • CodepointU+2140
  • NameDOUBLE-STRUCK N-ARY SUMMATION
  • Decimal8512
  • BlockLetterlike Symbols (U+2100–U+214F)
  • Plane0 — Basic Multilingual Plane
  • ScriptCommon
  • CategorySm — Math Symbol
  • Unicode version3.2 (2002)
  • Bidi classON — Other Neutral
  • Combining class0
  • East Asian widthN — Neutral
  • MirroredYes

About this character

U+2140 (⅀) is DOUBLE-STRUCK N-ARY SUMMATION, a mathematical symbol in the Letterlike Symbols block. Its script is Common: it is shared by many writing systems rather than belonging to one. It was added in Unicode 3.2 (2002).

It is a font variant of U+2211 ∑ (compatibility decomposition <font>). NFC and NFD leave it alone, but NFKC and NFKD replace it with U+2211 ∑. Search engines, identifier checks and username systems that apply NFKC will treat the two as the same text.

It is a mirrored character: in right-to-left text renderers draw its mirror image.

How to type ⅀

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Encodings & escapes

UTF-8 encoder →
UTF-8E2 85 803 bytes
UTF-1621401 code unit
UTF-32000021404 bytes
HTML decimal&#8512;
HTML hex&#x2140;
CSS\2140in content: "…"
JavaScript\u2140
JSON\u2140
Python\u2140
Python\N{DOUBLE-STRUCK N-ARY SUMMATION}by name
Java / C#\u2140
C / C++\u2140universal character name
Rust / Swift / PHP\u{2140}
Go\u2140
Ruby\u2140
Excel / Sheets=UNICHAR(8512)
URL-encoded%E2%85%80percent-encoded UTF-8
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Normalization forms

Normalizer →
NFCunchanged
NFDunchanged
NFKCU+2211 ∑
NFKDU+2211 ∑
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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+01A9ƩLatin Capital Letter Esh U+03A3ΣGreek Capital Letter Sigma U+2211∑N-Ary Summation U+1D6BA𝚺Mathematical Bold Capital Sigma U+1D6F4𝛴Mathematical Italic Capital Sigma U+1D72E𝜮Mathematical Bold Italic Capital Sigma U+1D768𝝨Mathematical Sans-Serif Bold Capital Sigma U+1D7A2𝞢Mathematical Sans-Serif Bold Italic Capital Sigma U+2D49ⵉTifinagh Letter Yi
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Nearby in Letterlike Symbols

All in block →
U+213A℺Rotated Capital Q U+213B℻Facsimile Sign U+213CℼDouble-Struck Small Pi U+213DℽDouble-Struck Small Gamma U+213EℾDouble-Struck Capital Gamma U+213FℿDouble-Struck Capital Pi U+2141⅁Turned Sans-Serif Capital G U+2142⅂Turned Sans-Serif Capital L U+2143⅃Reversed Sans-Serif Capital L U+2144⅄Turned Sans-Serif Capital Y U+2145ⅅDouble-Struck Italic Capital D U+2146ⅆDouble-Struck Italic Small D