Home U+3300 to U+33FF CJK Compatibility

# U+3381Square Na

U+3381 was added to Unicode in version 1.1 (1993). It belongs to the block U+3300 to U+33FF CJK Compatibility 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 glyph is a Square composition of the glyphs Latin Small Letter N, Latin Capital Letter A. It has a Wide East Asian Width. In bidirectional context it acts as Left To Right and is not mirrored. In text U+3381 behaves as Ideographic regarding line breaks. It has type Other for sentence and Other for word breaks. The Grapheme Cluster Break is Any.

The ampere (, US: ; symbol: A), often shortened to amp, is the unit of electric current in the International System of Units (SI). One ampere is equal to 6.241509074×1018 electrons worth of charge moving past a point in a second. It is named after French mathematician and physicist André-Marie Ampère (1775–1836), considered the father of electromagnetism along with Danish physicist Hans Christian Ørsted.

As of the 2019 redefinition of the SI base units, the ampere is defined by fixing the elementary charge e to be exactly 1.602176634×10−19 C (coulomb), which means an ampere is an electrical current equivalent to 1019 elementary charges moving every 1.602176634 seconds or 6.241509074×1018 elementary charges moving in a second. Prior to the redefinition the ampere was defined as the current that would need to be passed through 2 parallel wires 1 metre apart to produce a magnetic force of 2×10−7 newtons per metre.

The earlier CGS system had two definitions of current, one essentially the same as the SI's and the other using electric charge as the base unit, with the unit of charge defined by measuring the force between two charged metal plates. The ampere was then defined as one coulomb of charge per second. In SI, the unit of charge, the coulomb, is defined as the charge carried by one ampere during one second.

## Representations

System Representation
13185
UTF-8 E3 8E 81
UTF-16 33 81
UTF-32 00 00 33 81
URL-Quoted %E3%8E%81
HTML hex reference &#x3381;
Wrong windows-1252 Mojibake ãŽ
Encoding: EUC-KR (hex bytes) A7 CA

## Complete Record

Property Value
Age 1.1 (1993)
Unicode Name SQUARE NA
Unicode 1 Name SQUARED NA
Block CJK Compatibility
General Category Other Symbol
Script Common
Bidirectional Category Left To Right
Combining Class Not Reordered
Decomposition Type Square
Decomposition Mapping Latin Small Letter N Latin Capital Letter A
Lowercase
Simple Lowercase Mapping Square Na
Lowercase Mapping Square Na
Uppercase
Simple Uppercase Mapping Square Na
Uppercase Mapping Square Na
Simple Titlecase Mapping Square Na
Titlecase Mapping Square Na
Case Folding Square Na
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 Latin Small Letter N Latin Small Letter A
Grapheme Cluster Break Any
Grapheme Base
Grapheme Extend
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 Latin Small Letter N Latin Small Letter A
NFKC Quick Check No
NFKD Quick Check No
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 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 Square Na
Bidi Paired Bracket Type None
East Asian Width Wide
Hangul Syllable Type Not Applicable
ISO 10646 Comment
Joining Group No_Joining_Group
Joining Type Non Joining
Line Break Ideographic
Numeric Type None
Numeric Value not a number
Simple Case Folding Square Na
Script Extension
Vertical Orientation U