Home U+2190 to U+21FF Arrows
Glyph for U+21B9
Source: Noto Sans Math

U+21B9 Leftwards Arrow To Bar Over Rightwards Arrow To Bar

U+21B9 was added in Unicode version 1.1 in 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 Other Symbol and is commonly used, that is, in no specific script. The character is also known as tab with shift tab.

The glyph is not a composition. Its width in East Asian texts is determined by its context. It can be displayed wide or narrow. In bidirectional text it acts as Other Neutral. When changing direction it is not mirrored. The word that U+21B9 forms with similar adjacent characters prevents a line break inside it.

The CLDR project calls this character “leftwards over rightwards arrow bars” for use in screen reading software. It assigns these additional labels, e.g. for search in emoji pickers: arrow, bar, leftwards, rightwards.

The Wikipedia has the following information about this codepoint:

The tab key Tab ↹ (abbreviation of tabulator key or tabular key) on a keyboard is used to advance the cursor to the next tab stop.

Representations

System Representation
Nº 8633
UTF-8 E2 86 B9
UTF-16 21 B9
UTF-32 00 00 21 B9
URL-Quoted %E2%86%B9
HTML hex reference ↹
Wrong windows-1252 Mojibake ↹
alias tab with shift tab

Elsewhere

Complete Record

Property Value
Age (age) 1.1 (1993)
Unicode Name (na) LEFTWARDS ARROW TO BAR OVER RIGHTWARDS ARROW TO BAR
Unicode 1 Name (na1) LEFT ARROW TO BAR OVER RIGHT ARROW TO BAR
Block (blk) Arrows
General Category (gc) Other Symbol
Script (sc) Common
Bidirectional Category (bc) Other Neutral
Combining Class (ccc) Not Reordered
Decomposition Type (dt) none
Decomposition Mapping (dm) Glyph for U+21B9 Leftwards Arrow To Bar Over Rightwards Arrow To Bar
Lowercase (Lower) ✘
Simple Lowercase Mapping (slc) Glyph for U+21B9 Leftwards Arrow To Bar Over Rightwards Arrow To Bar
Lowercase Mapping (lc) Glyph for U+21B9 Leftwards Arrow To Bar Over Rightwards Arrow To Bar
Uppercase (Upper) ✘
Simple Uppercase Mapping (suc) Glyph for U+21B9 Leftwards Arrow To Bar Over Rightwards Arrow To Bar
Uppercase Mapping (uc) Glyph for U+21B9 Leftwards Arrow To Bar Over Rightwards Arrow To Bar
Simple Titlecase Mapping (stc) Glyph for U+21B9 Leftwards Arrow To Bar Over Rightwards Arrow To Bar
Titlecase Mapping (tc) Glyph for U+21B9 Leftwards Arrow To Bar Over Rightwards Arrow To Bar
Case Folding (cf) Glyph for U+21B9 Leftwards Arrow To Bar Over Rightwards Arrow To Bar
ASCII Hex Digit (AHex) ✘
Alphabetic (Alpha) ✘
Bidi Control (Bidi_C) ✘
Bidi Mirrored (Bidi_M) ✘
Composition Exclusion (CE) ✘
Case Ignorable (CI) ✘
Changes When Casefolded (CWCF) ✘
Changes When Casemapped (CWCM) ✘
Changes When NFKC Casefolded (CWKCF) ✘
Changes When Lowercased (CWL) ✘
Changes When Titlecased (CWT) ✘
Changes When Uppercased (CWU) ✘
Cased (Cased) ✘
Full Composition Exclusion (Comp_Ex) ✘
Default Ignorable Code Point (DI) ✘
Dash (Dash) ✘
Deprecated (Dep) ✘
Diacritic (Dia) ✘
Emoji Modifier Base (EBase) ✘
Emoji Component (EComp) ✘
Emoji Modifier (EMod) ✘
Emoji Presentation (EPres) ✘
Emoji (Emoji) ✘
Extender (Ext) ✘
Extended Pictographic (ExtPict) ✘
FC NFKC Closure (FC_NFKC) Glyph for U+21B9 Leftwards Arrow To Bar Over Rightwards Arrow To Bar
Grapheme Cluster Break (GCB) Any
Grapheme Base (Gr_Base) ✔
Grapheme Extend (Gr_Ext) ✘
Grapheme Link (Gr_Link) ✘
Hex Digit (Hex) ✘
Hyphen (Hyphen) ✘
ID Continue (IDC) ✘
ID Start (IDS) ✘
IDS Binary Operator (IDSB) ✘
IDS Trinary Operator and (IDST) ✘
IDSU (IDSU) 0
ID_Compat_Math_Continue (ID_Compat_Math_Continue) 0
ID_Compat_Math_Start (ID_Compat_Math_Start) 0
Ideographic (Ideo) ✘
InCB (InCB) None
Indic Mantra Category (InMC) —
Indic Positional Category (InPC) NA
Indic Syllabic Category (InSC) Other
Jamo Short Name (JSN) —
Join Control (Join_C) ✘
Logical Order Exception (LOE) ✘
Math (Math) ✘
Noncharacter Code Point (NChar) ✘
NFC Quick Check (NFC_QC) Yes
NFD Quick Check (NFD_QC) Yes
NFKC Casefold (NFKC_CF) Glyph for U+21B9 Leftwards Arrow To Bar Over Rightwards Arrow To Bar
NFKC Quick Check (NFKC_QC) Yes
NFKC_SCF (NFKC_SCF) Glyph for U+21B9 Leftwards Arrow To Bar Over Rightwards Arrow To Bar
NFKD Quick Check (NFKD_QC) Yes
Other Alphabetic (OAlpha) ✘
Other Default Ignorable Code Point (ODI) ✘
Other Grapheme Extend (OGr_Ext) ✘
Other ID Continue (OIDC) ✘
Other ID Start (OIDS) ✘
Other Lowercase (OLower) ✘
Other Math (OMath) ✘
Other Uppercase (OUpper) ✘
Prepended Concatenation Mark (PCM) ✘
Pattern Syntax (Pat_Syn) ✔
Pattern White Space (Pat_WS) ✘
Quotation Mark (QMark) ✘
Regional Indicator (RI) ✘
Radical (Radical) ✘
Sentence Break (SB) Other
Soft Dotted (SD) ✘
Sentence Terminal (STerm) ✘
Terminal Punctuation (Term) ✘
Unified Ideograph (UIdeo) ✘
Variation Selector (VS) ✘
Word Break (WB) Other
White Space (WSpace) ✘
XID Continue (XIDC) ✘
XID Start (XIDS) ✘
Expands On NFC (XO_NFC) ✘
Expands On NFD (XO_NFD) ✘
Expands On NFKC (XO_NFKC) ✘
Expands On NFKD (XO_NFKD) ✘
Bidi Paired Bracket (bpb) Glyph for U+21B9 Leftwards Arrow To Bar Over Rightwards Arrow To Bar
Bidi Paired Bracket Type (bpt) None
East Asian Width (ea) ambiguous
Hangul Syllable Type (hst) Not Applicable
ISO 10646 Comment (isc) —
Joining Group (jg) No_Joining_Group
Joining Type (jt) Non Joining
Line Break (lb) Alphabetic
Numeric Type (nt) none
Numeric Value (nv) not a number
Simple Case Folding (scf) Glyph for U+21B9 Leftwards Arrow To Bar Over Rightwards Arrow To Bar
Script Extension (scx)
Vertical Orientation (vo) R