This character is a Decimal Number and is mainly used in the Lao script. The codepoint has the decimal value 9.
The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it is written from left to right. When changing direction it is not mirrored. This number joins with other adjacent letters and numbers to form a word. U+0ED9 forms a number with similar characters, which prevents a line break inside it.
The Wikipedia has the following information about this codepoint:
9 (nine) is the natural number following 8 and preceding 10.
Representations
System
Representation (click value to copy)
Nº
3801
UTF-8
E0 BB 99
UTF-16
0E D9
UTF-32
00 00 0E D9
URL-Quoted
%E0%BB%99
HTML hex reference
໙
Wrong windows-1252 Mojibake
à»™
Encoding: GB18030 (hex bytes)
81 32 E4 35
RFC 5137
\u'0ED9'
Bash and Zsh inside echo -e
\u0ED9
C and C++
\u0ED9
C#
\u0ED9
CSS
\000ED9
Excel
=UNICHAR(3801)
Go
\u0ED9
JavaScript
\u0ED9
Modern JavaScript since ES6
\u{ed9}
JSON
\u0ED9
Java
\u0ED9
Lua
\u{ED9}
Matlab
char(3801)
Perl
"\x{ED9}"
PHP
\u{ed9}
PostgreSQL
U&'\0ED9'
PowerShell
`u{ED9}
Python
\u0ED9
Ruby
\u{ed9}
Rust
\u{ed9}
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