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# U+0031Digit One

U+0031 was added to Unicode in version 1.1 (1993). It belongs to the block U+0000 to U+007F Basic Latin in the U+0000 to U+FFFF Basic Multilingual Plane.

This character is a Decimal Number and is commonly used, that is, in no specific script. The codepoint has the Decimal value 1.

The glyph is not a composition. It has a Narrow East Asian Width. In bidirectional context it acts as European Number and is not mirrored. The glyph can, under circumstances, be confused with 1 other glyphs. In text U+0031 behaves as Numeric regarding line breaks. It has type Numeric for sentence and Numeric for word breaks. The Grapheme Cluster Break is Any.

This character is designated as an emoji. It will be rendered as monochrome character on conforming platforms. To enable colorful emoji display, you can combine it with Variation Selector-16: 1️ See the Emojipedia for more details on this character’s emoji properties.

1 (one, unit, unity) is a number representing a single or the only entity. 1 is also a numerical digit and represents a single unit of counting or measurement. For example, a line segment of unit length is a line segment of length 1. In conventions of sign where zero is considered neither positive nor negative, 1 is the first and smallest positive integer. It is also sometimes considered the first of the infinite sequence of natural numbers, followed by 2, although by other definitions 1 is the second natural number, following 0.

The fundamental mathematical property of 1 is to be a multiplicative identity, meaning that any number multiplied by 1 equals the same number. Most if not all properties of 1 can be deduced from this. In advanced mathematics, a multiplicative identity is often denoted 1, even if it is not a number. 1 is by convention not considered a prime number; this was not universally accepted until the mid-20th century. Additionally, 1 is the smallest possible difference between two distinct natural numbers.

The unique mathematical properties of the number have led to its unique uses in other fields, ranging from science to sports. It commonly denotes the first, leading, or top thing in a group.

## Representations

System Representation
49
UTF-8 31
UTF-16 00 31
UTF-32 00 00 00 31
URL-Quoted %31
HTML hex reference &#x0031;
AGL: Latin-1 one
AGL: Latin-2 one
AGL: Latin-3 one
AGL: Latin-4 one
AGL: Latin-5 one
digraph 1

## Complete Record

Property Value
Age 1.1 (1993)
Unicode Name DIGIT ONE
Unicode 1 Name
Block Basic Latin
General Category Decimal Number
Script Common
Bidirectional Category European Number
Combining Class Not Reordered
Decomposition Type None
Decomposition Mapping Digit One
Lowercase
Simple Lowercase Mapping Digit One
Lowercase Mapping Digit One
Uppercase
Simple Uppercase Mapping Digit One
Uppercase Mapping Digit One
Simple Titlecase Mapping Digit One
Titlecase Mapping Digit One
Case Folding Digit One
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 Digit One
Grapheme Cluster Break Any
Grapheme Base
Grapheme Extend
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 Number
Jamo Short Name
Join Control
Logical Order Exception
Math
Noncharacter Code Point
NFC Quick Check Yes
NFD Quick Check Yes
NFKC Casefold Digit One
NFKC Quick Check Yes
NFKC_SCF Digit One
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
Sentence Break Numeric
Soft Dotted
Sentence Terminal
Terminal Punctuation
Unified Ideograph
Variation Selector
Word Break Numeric
White Space
XID Continue
XID Start
Expands On NFC
Expands On NFD
Expands On NFKC
Expands On NFKD
Bidi Paired Bracket Digit One
Bidi Paired Bracket Type None
East Asian Width Narrow
Hangul Syllable Type Not Applicable
ISO 10646 Comment
Joining Group No_Joining_Group
Joining Type Non Joining
Line Break Numeric
Numeric Type Decimal
Numeric Value 1
Simple Case Folding Digit One
Script Extension
Vertical Orientation R