This character is a Math Symbol and is commonly used, that is, in no specific script. The character is also known as z notation generalised union.
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+22C3 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 “n-ary union” for use in screen reading software. It assigns these additional labels, e.g. for search in emoji pickers: mathematics, n-ary, operator, set, union.
The Wikipedia has the following information about this codepoint:
In set theory, the union (denoted by ∪) of a collection of sets is the set of all elements in the collection. It is one of the fundamental operations through which sets can be combined and related to each other.
A nullary union refers to a union of zero () sets and it is by definition equal to the empty set.
For explanation of the symbols used in this article, refer to the table of mathematical symbols.
Representations
System
Representation (click value to copy)
Nº
8899
UTF-8
E2 8B 83
UTF-16
22 C3
UTF-32
00 00 22 C3
URL-Quoted
%E2%8B%83
HTML hex reference
⋃
Wrong windows-1252 Mojibake
⋃
HTML named entity
⋃
HTML named entity
⋃
HTML named entity
⋃
alias
z notation generalised union
Encoding: GB18030 (hex bytes)
81 36 E1 34
LATEX
\bigcup
RFC 5137
\u'22C3'
Bash and Zsh inside echo -e
\u22C3
C and C++
\u22C3
C#
\u22C3
CSS
\0022C3
Excel
=UNICHAR(8899)
Go
\u22C3
JavaScript
\u22C3
Modern JavaScript since ES6
\u{22c3}
JSON
\u22C3
Java
\u22C3
Lua
\u{22C3}
Matlab
char(8899)
Perl
"\x{22C3}"
PHP
\u{22c3}
PostgreSQL
U&'\22C3'
PowerShell
`u{22C3}
Python
\u22C3
Ruby
\u{22c3}
Rust
\u{22c3}
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