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Glyph for U+221E
Source: Noto Sans Math

U+221E Infinity

U+221E was added to Unicode in version 1.1 (1993). It belongs to the block U+2200 to U+22FF Mathematical Operators in the U+0000 to U+FFFF Basic Multilingual Plane.

This character is a Math Symbol and is commonly used, that is, in no specific script.

The glyph is not a composition. It has a Ambiguous East Asian Width. In bidirectional context it acts as Other Neutral and is not mirrored. The glyph can, under circumstances, be confused with 1 other glyphs. In text U+221E behaves as Ambiguous (Alphabetic or Ideographic) regarding line breaks. It has type Other for sentence and Other for word breaks. The Grapheme Cluster Break is Any.

The CLDR project labels this character “infinity sign” for use in screen reading software. It assigns additional tags, e.g. for search in emoji pickers: infinity.

The Wikipedia has the following information about this codepoint:

The infinity symbol ( ∞ {displaystyle infty } ) is a mathematical symbol representing the concept of infinity. This symbol is also called a lemniscate, after the lemniscate curves of a similar shape studied in algebraic geometry, or "lazy eight", in the terminology of livestock branding.

This symbol was first used mathematically by John Wallis in the 17th century, although it has a longer history of other uses. In mathematics, it often refers to infinite processes (potential infinity) rather than infinite values (actual infinity). It has other related technical meanings, such as the use of long-lasting paper in bookbinding, and has been used for its symbolic value of the infinite in modern mysticism and literature. It is a common element of graphic design, for instance in corporate logos as well as in older designs such as the Métis flag.

Both the infinity symbol itself and several variations of the symbol are available in various character encodings.

Representations

System Representation
8734
UTF-8 E2 88 9E
UTF-16 22 1E
UTF-32 00 00 22 1E
URL-Quoted %E2%88%9E
HTML hex reference ∞
Wrong windows-1252 Mojibake ∞
HTML named entity ∞
Encoding: EUC-KR (hex bytes) A1 C4
Encoding: JIS0208 (hex bytes) A1 E7
Encoding: MACINTOSH (hex bytes) B0
Encoding: X-MAC-CYRILLIC (hex bytes) B0
LATEX \infty
AGL: Latin-2 infinity
AGL: Latin-3 infinity
AGL: Latin-4 infinity
AGL: Latin-5 infinity
Adobe Glyph List infinity
digraph 00

Related Characters

Confusables

Elsewhere

Complete Record

Property Value
Age 1.1 (1993)
Unicode Name INFINITY
Unicode 1 Name
Block Mathematical Operators
General Category Math Symbol
Script Common
Bidirectional Category Other Neutral
Combining Class Not Reordered
Decomposition Type None
Decomposition Mapping Glyph for U+221E Infinity
Lowercase
Simple Lowercase Mapping Glyph for U+221E Infinity
Lowercase Mapping Glyph for U+221E Infinity
Uppercase
Simple Uppercase Mapping Glyph for U+221E Infinity
Uppercase Mapping Glyph for U+221E Infinity
Simple Titlecase Mapping Glyph for U+221E Infinity
Titlecase Mapping Glyph for U+221E Infinity
Case Folding Glyph for U+221E Infinity
ASCII Hex Digit
Alphabetic
Bidi Control
Bidi Mirrored
Composition Exclusion
Case Ignorable
Changes When Casefolded
Changes When Casemapped
Changes When NFKC Casefolded
Changes When Lowercased
Changes When Titlecased
Changes When Uppercased
Cased
Full Composition Exclusion
Default Ignorable Code Point
Dash
Deprecated
Diacritic
Emoji Modifier Base
Emoji Component
Emoji Modifier
Emoji Presentation
Emoji
Extender
Extended Pictographic
FC NFKC Closure Glyph for U+221E Infinity
Grapheme Cluster Break Any
Grapheme Base
Grapheme Extend
Grapheme Link
Hex Digit
Hyphen
ID Continue
ID Start
IDS Binary Operator
IDS Trinary Operator and
IDSU 0
ID_Compat_Math_Continue 1
ID_Compat_Math_Start 1
Ideographic
InCB None
Indic Mantra Category
Indic Positional Category NA
Indic Syllabic Category Other
Jamo Short Name
Join Control
Logical Order Exception
Math
Noncharacter Code Point
NFC Quick Check Yes
NFD Quick Check Yes
NFKC Casefold Glyph for U+221E Infinity
NFKC Quick Check Yes
NFKC_SCF Glyph for U+221E Infinity
NFKD Quick Check Yes
Other Alphabetic
Other Default Ignorable Code Point
Other Grapheme Extend
Other ID Continue
Other ID Start
Other Lowercase
Other Math
Other Uppercase
Prepended Concatenation Mark
Pattern Syntax
Pattern White Space
Quotation Mark
Regional Indicator
Radical
Sentence Break Other
Soft Dotted
Sentence Terminal
Terminal Punctuation
Unified Ideograph
Variation Selector
Word Break Other
White Space
XID Continue
XID Start
Expands On NFC
Expands On NFD
Expands On NFKC
Expands On NFKD
Bidi Paired Bracket Glyph for U+221E Infinity
Bidi Paired Bracket Type None
East Asian Width Ambiguous
Hangul Syllable Type Not Applicable
ISO 10646 Comment
Joining Group No_Joining_Group
Joining Type Non Joining
Line Break Ambiguous (Alphabetic or Ideographic)
Numeric Type None
Numeric Value not a number
Simple Case Folding Glyph for U+221E Infinity
Script Extension
Vertical Orientation U