This character is a Math Symbol and is commonly used, that is, in no specific script. The character is also known as saturating subtraction.
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+2238 forms with similar adjacent characters prevents a line break inside it. The glyph can be confused with one other glyph.
The Wikipedia has the following information about this codepoint:
In mathematics, monus is an operator on certain commutative monoids that are not groups. A commutative monoid on which a monus operator is defined is called a commutative monoid with monus, or CMM. The monus operator may be denoted with the − symbol because the natural numbers are a CMM under subtraction; it is also denoted with the symbol to distinguish it from the standard subtraction operator.
Representations
System
Representation (click value to copy)
Nº
8760
UTF-8
E2 88 B8
UTF-16
22 38
UTF-32
00 00 22 38
URL-Quoted
%E2%88%B8
HTML hex reference
∸
Wrong windows-1252 Mojibake
∸
HTML named entity
∸
HTML named entity
∸
alias
saturating subtraction
Encoding: GB18030 (hex bytes)
81 36 D5 31
LATEX
\ElsevierGlyph{2238}
RFC 5137
\u'2238'
Bash and Zsh inside echo -e
\u2238
C and C++
\u2238
C#
\u2238
CSS
\002238
Excel
=UNICHAR(8760)
Go
\u2238
JavaScript
\u2238
Modern JavaScript since ES6
\u{2238}
JSON
\u2238
Java
\u2238
Lua
\u{2238}
Matlab
char(8760)
Perl
"\x{2238}"
PHP
\u{2238}
PostgreSQL
U&'\2238'
PowerShell
`u{2238}
Python
\u2238
Ruby
\u{2238}
Rust
\u{2238}
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