Home U+2190 to U+21FF Arrows
Glyph for U+21A1
Source: Noto Sans Math

U+21A1 Downwards Two Headed Arrow

U+21A1 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. Znak jest również znany jako form feed i fast cursor down.

The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it acts as Other Neutral. When changing direction it is not mirrored. The word that U+21A1 forms with similar adjacent characters prevents a line break inside it. The glyph can be confused with one other glyph.

The CLDR project calls this character “strzałka w dół z podwójnym grotem” for use in screen reading software.

Wikipedia ma następujące informacje na temat tej współrzędnej kodowej:

A page break is a marker in an electronic document that tells the document interpreter that the content which follows is part of a new page. A page break causes a form feed to be sent to the printer during spooling of the document to the printer. Thus it is one of the elements that contributes to pagination.

Reprezentacje

System Reprezentacje (click value to copy)
Nº 8609
UTF-8 E2 86 A1
UTF-16 21 A1
UTF-32 00 00 21 A1
Adres URL cytowany %E2%86%A1
HTML hex reference ↡
Błędne windows-1252 Mojibake ↡
HTML named entity ↡
alias form feed
alias fast cursor down
Kodowanie: GB18030 (hex bajtów) 81 36 C8 31
RFC 5137 \u'21A1'
Bash and Zsh inside echo -e\u21A1
C and C++ \u21A1
C# \u21A1
CSS \0021A1
Excel =UNICHAR(8609)
Go \u21A1
JavaScript \u21A1
Modern JavaScript since ES6\u{21a1}
JSON \u21A1
Java \u21A1
Lua \u{21A1}
Matlab char(8609)
Perl "\x{21A1}"
PHP \u{21a1}
PostgreSQL U&'\21A1'
PowerShell `u{21A1}
Python \u21A1
Ruby \u{21a1}
Rust \u{21a1}
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Kompletny opis

Właściwość Wartość
Age (age) 1.1 (1993)
Unicode Name (na) DOWNWARDS TWO HEADED ARROW
Unicode 1 Name (na1) DOWN TWO HEADED ARROW
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+21A1 Downwards Two Headed Arrow
Lowercase (Lower) ✘
Simple Lowercase Mapping (slc) Glyph for U+21A1 Downwards Two Headed Arrow
Lowercase Mapping (lc) Glyph for U+21A1 Downwards Two Headed Arrow
Uppercase (Upper) ✘
Simple Uppercase Mapping (suc) Glyph for U+21A1 Downwards Two Headed Arrow
Uppercase Mapping (uc) Glyph for U+21A1 Downwards Two Headed Arrow
Simple Titlecase Mapping (stc) Glyph for U+21A1 Downwards Two Headed Arrow
Titlecase Mapping (tc) Glyph for U+21A1 Downwards Two Headed Arrow
Case Folding (cf) Glyph for U+21A1 Downwards Two Headed Arrow
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+21A1 Downwards Two Headed Arrow
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) ✘
Modifier Combining Mark (MCM) ✘
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+21A1 Downwards Two Headed Arrow
NFKC Quick Check (NFKC_QC) Yes
NFKC_SCF (NFKC_SCF) Glyph for U+21A1 Downwards Two Headed Arrow
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+21A1 Downwards Two Headed Arrow
Bidi Paired Bracket Type (bpt) None
East Asian Width (ea) neutral
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
Wartość liczbowa (nv) not a number
Simple Case Folding (scf) Glyph for U+21A1 Downwards Two Headed Arrow
Script Extension (scx)
Vertical Orientation (vo) R