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Glyph for U+21AE
Source: Noto Sans Math

U+21AE Left Right Arrow with Stroke

U+21AE was added to Unicode in version 1.1 (1993). It belongs to the block U+2190 to U+21FF Arrows 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 a Canonical composition of the glyphs Glyph for U+2194 Left Right Arrow, Glyph for U+0338 Combining Long Solidus Overlay. It has a Neutral East Asian Width. In bidirectional context it acts as Other Neutral and is not mirrored. In text U+21AE behaves as Alphabetic 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 “left right arrow stroke” for use in screen reading software.

The Wikipedia has the following information about this codepoint:

Exclusive or or exclusive disjunction or exclusive alternation, also known as non-equivalence which is the negation of equivalence, is a logical operation that is true if and only if its arguments differ (one is true, the other is false).

It is symbolized by the prefix operator J {displaystyle J} : 16  and by the infix operators XOR (, , or ), EOR, EXOR, ∨ ˙ {displaystyle {dot {vee }}} , ∨ ¯ {displaystyle {overline {vee }}} , ∨ _ {displaystyle {underline {vee }}} , , ⊕ {displaystyle oplus } , ↮ {displaystyle leftrightarrow } and ≢ {displaystyle ot equiv } .

It gains the name "exclusive or" because the meaning of "or" is ambiguous when both operands are true; the exclusive or operator excludes that case. This is sometimes thought of as "one or the other but not both" or "either one or the other". This could be written as "A or B, but not, A and B".

XOR is equivalent to logical inequality (NEQ) since it is true only when the inputs are different (one is true, and one is false). The negation of XOR is the logical biconditional, which yields true if and only if the two inputs are the same, which is equivalent to logical equality (EQ).

Since it is associative, it may be considered to be an n-ary operator which is true if and only if an odd number of arguments are true. That is, a XOR b XOR ... may be treated as XOR(a,b,...).

Representations

System Representation
8622
UTF-8 E2 86 AE
UTF-16 21 AE
UTF-32 00 00 21 AE
URL-Quoted %E2%86%AE
HTML hex reference ↮
Wrong windows-1252 Mojibake ↮
HTML named entity ↮
HTML named entity ↮
LATEX \nleftrightarrow

Elsewhere

Complete Record

Property Value
Age 1.1 (1993)
Unicode Name LEFT RIGHT ARROW WITH STROKE
Unicode 1 Name
Block Arrows
General Category Math Symbol
Script Common
Bidirectional Category Other Neutral
Combining Class Not Reordered
Decomposition Type Canonical
Decomposition Mapping Glyph for U+2194 Left Right Arrow Glyph for U+0338 Combining Long Solidus Overlay
Lowercase
Simple Lowercase Mapping Glyph for U+21AE Left Right Arrow with Stroke
Lowercase Mapping Glyph for U+21AE Left Right Arrow with Stroke
Uppercase
Simple Uppercase Mapping Glyph for U+21AE Left Right Arrow with Stroke
Uppercase Mapping Glyph for U+21AE Left Right Arrow with Stroke
Simple Titlecase Mapping Glyph for U+21AE Left Right Arrow with Stroke
Titlecase Mapping Glyph for U+21AE Left Right Arrow with Stroke
Case Folding Glyph for U+21AE Left Right Arrow with Stroke
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+21AE Left Right Arrow with Stroke
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 0
ID_Compat_Math_Start 0
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 No
NFKC Casefold Glyph for U+21AE Left Right Arrow with Stroke
NFKC Quick Check Yes
NFKC_SCF Glyph for U+21AE Left Right Arrow with Stroke
NFKD Quick Check No
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+21AE Left Right Arrow with Stroke
Bidi Paired Bracket Type None
East Asian Width Neutral
Hangul Syllable Type Not Applicable
ISO 10646 Comment
Joining Group No_Joining_Group
Joining Type Non Joining
Line Break Alphabetic
Numeric Type None
Numeric Value not a number
Simple Case Folding Glyph for U+21AE Left Right Arrow with Stroke
Script Extension
Vertical Orientation R