This character is a Other Symbol and is commonly used, that is, in no specific script.
The glyph is not a composition. Its East Asian Width is wide. In bidirectional text it acts as Other Neutral. When changing direction it is not mirrored. U+1F918 prohibits a line break after it, if it’s followed by an emoji modifier.
The CLDR project calls this character “sign of the horns” for use in screen reading software. It assigns these additional labels, e.g. for search in emoji pickers: finger, hand, horns, rock-on, sign.
This character is designated as an emoji. It will be rendered as colorful emoji on conforming platforms. To reduce it to a monochrome character, you can combine it with Variation Selector-15: 🤘︎ The character can be changed in appearance, if it is followed by an emoji modifier. See the Emojipedia for more details on this character’s emoji properties.
The Wikipedia has the following information about this codepoint:
The sign of the horns is a hand gesture with a variety of meanings and uses in various cultures. It is formed by extending the index and little fingers while holding the middle and ring fingers down with the thumb.
Representations
System
Representation (click value to copy)
Nº
129304
UTF-8
F0 9F A4 98
UTF-16
D8 3E DD 18
UTF-32
00 01 F9 18
URL-Quoted
%F0%9F%A4%98
HTML hex reference
🤘
Wrong windows-1252 Mojibake
🤘
Encoding: GB18030 (hex bytes)
95 30 CD 38
RFC 5137
\u'1F918'
Bash and Zsh inside echo -e
\U0001F918
C and C++
\U0001F918
C#
\U0001F918
CSS
\01F918
Excel
=UNICHAR(129304)
Go
\U0001F918
JavaScript
\uD83E\uDD18
Modern JavaScript since ES6
\u{1f918}
JSON
\uD83E\uDD18
Java
\uD83E\uDD18
Lua
\u{1F918}
Matlab
char(129304)
Perl
"\x{1F918}"
PHP
\u{1f918}
PostgreSQL
U&'\+01F918'
PowerShell
`u{1F918}
Python
\U0001F918
Ruby
\u{1f918}
Rust
\u{1f918}
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