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Glyph for U+2309
Source: Noto Sans Math

U+2309 Right Ceiling

U+2309 was added to Unicode in version 1.1 (1993). It belongs to the block U+2300 to U+23FF Miscellaneous Technical in the U+0000 to U+FFFF Basic Multilingual Plane.

This character is a Close Punctuation and is commonly used, that is, in no specific script.

The glyph is not a composition. It has a Neutral East Asian Width. In bidirectional context it acts as Other Neutral and is mirrored. Its corresponding mirrored glyph is Glyph for U+2308 Left Ceiling. In text U+2309 behaves as Close Punctuation regarding line breaks. It has type Close for sentence and Other for word breaks. The Grapheme Cluster Break is Any.

The Wikipedia has the following information about this codepoint:

In mathematics and computer science, the floor function is the function that takes as input a real number x, and gives as output the greatest integer less than or equal to x, denoted ⌊x⌋ or floor(x). Similarly, the ceiling function maps x to the least integer greater than or equal to x, denoted ⌈x⌉ or ceil(x).

For example (floor), ⌊2.4⌋ = 2, ⌊−2.4⌋ = −3, and for ceiling; ⌈2.4⌉ = 3, and ⌈−2.4⌉ = −2.

Historically, the floor of x has been–and still is–called the integral part or integer part of x, often denoted [x] (as well as a variety of other notations). However, the same term, integer part, is also used for truncation towards zero, which differs from the floor function for negative numbers.

For n an integer, ⌊n⌋ = ⌈n⌉ = [n] = n.

Representations

System Representation
8969
UTF-8 E2 8C 89
UTF-16 23 09
UTF-32 00 00 23 09
URL-Quoted %E2%8C%89
HTML hex reference ⌉
Wrong windows-1252 Mojibake ⌉
HTML named entity ⌉
HTML named entity ⌉
LATEX \rceil
digraph >7

Related Characters

Elsewhere

Complete Record

Property Value
Age 1.1 (1993)
Unicode Name RIGHT CEILING
Unicode 1 Name
Block Miscellaneous Technical
General Category Close Punctuation
Script Common
Bidirectional Category Other Neutral
Combining Class Not Reordered
Decomposition Type None
Decomposition Mapping Glyph for U+2309 Right Ceiling
Lowercase
Simple Lowercase Mapping Glyph for U+2309 Right Ceiling
Lowercase Mapping Glyph for U+2309 Right Ceiling
Uppercase
Simple Uppercase Mapping Glyph for U+2309 Right Ceiling
Uppercase Mapping Glyph for U+2309 Right Ceiling
Simple Titlecase Mapping Glyph for U+2309 Right Ceiling
Titlecase Mapping Glyph for U+2309 Right Ceiling
Case Folding Glyph for U+2309 Right Ceiling
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+2309 Right Ceiling
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 Yes
NFKC Casefold Glyph for U+2309 Right Ceiling
NFKC Quick Check Yes
NFKC_SCF Glyph for U+2309 Right Ceiling
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 Close
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 Mirrored Glyph Glyph for U+2308 Left Ceiling
Bidi Paired Bracket Glyph for U+2308 Left Ceiling
Bidi Paired Bracket Type Close
East Asian Width Neutral
Hangul Syllable Type Not Applicable
ISO 10646 Comment
Joining Group No_Joining_Group
Joining Type Non Joining
Line Break Close Punctuation
Numeric Type None
Numeric Value not a number
Simple Case Folding Glyph for U+2309 Right Ceiling
Script Extension
Vertical Orientation R