Source: Noto Sans Math

U+21E4 Leftwards Arrow To Bar

U+21E4 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 Other Symbol and is commonly used, that is, in no specific script. The character is also known as leftward tab.

The glyph is not a composition. It has a Neutral East Asian Width. In bidirectional context it acts as Other Neutral and is not mirrored. In text U+21E4 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 “leftwards arrow bar” for use in screen reading software. It assigns additional tags, e.g. for search in emoji pickers: leftwards arrow bar.

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	8676
UTF-8	E2 87 A4
UTF-16	21 E4
UTF-32	00 00 21 E4
URL-Quoted	%E2%87%A4
HTML-Escape	⇤
Wrong windows-1252 Mojibake	â¤
HTML-Escape	&LeftArrowBar;
HTML-Escape	&larrb;
alias	leftward tab
Adobe Glyph List	arrowtableft

Elsewhere

Complete Record

Property	Value
Age	1.1 (1993)
Unicode Name	LEFTWARDS ARROW TO BAR
Unicode 1 Name	LEFT ARROW TO BAR
Block	Arrows
General Category	Other Symbol
Script	Common
Bidirectional Category	Other Neutral
Combining Class	Not Reordered
Decomposition Type	None
Decomposition Mapping	Leftwards Arrow To Bar
Lowercase	✘
Simple Lowercase Mapping	Leftwards Arrow To Bar
Lowercase Mapping	Leftwards Arrow To Bar
Uppercase	✘
Simple Uppercase Mapping	Leftwards Arrow To Bar
Uppercase Mapping	Leftwards Arrow To Bar
Simple Titlecase Mapping	Leftwards Arrow To Bar
Titlecase Mapping	Leftwards Arrow To Bar
Case Folding	Leftwards Arrow To Bar
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	Leftwards Arrow To Bar
Grapheme Cluster Break	Any
Grapheme Base	✔
Grapheme Extend	✘
Grapheme Link	✘
Hex Digit	✘
Hyphen	✘
ID Continue	✘
ID Start	✘
IDS Binary Operator	✘
IDS Trinary Operator and	✘
Ideographic	✘
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	Leftwards Arrow To Bar
NFKC Quick Check	Yes
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	Leftwards Arrow To Bar
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	Leftwards Arrow To Bar
Script Extension
Vertical Orientation	R