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+1F91F prohibits a line break after it, if it’s followed by an emoji modifier.
The CLDR project calls this character “love-you gesture” for use in screen reading software. It assigns these additional labels, e.g. for search in emoji pickers: fingers, gesture, hand, ILY, love, love-you, three, you.
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 ILY is a sign from American Sign Language which, as a gesture, has moved into the mainstream. Seen primarily in the United States and other Americanized countries, the sign originated among deaf schoolchildren using American Sign Language to create a sign from a combination of the signs for the letters I, L, and Y (I Love You).
The sign is an informal expression of any of several positive feelings, ranging from general esteem to love, for the recipient of the sign. A similar-looking but unrelated variation in which the thumb is toward the palm appears in heavy metal music culture as a "horns" hand-sign (though the thumbs extended version is sometimes used) and in college football as a sign of support for various teams including the University of Texas. The University of Louisiana at Lafayette's Ragin' Cajuns Athletics uses the ILY sign to symbolize the initials of the university (UL).
Representations
System
Representation (click value to copy)
Nº
129311
UTF-8
F0 9F A4 9F
UTF-16
D8 3E DD 1F
UTF-32
00 01 F9 1F
URL-Quoted
%F0%9F%A4%9F
HTML hex reference
🤟
Wrong windows-1252 Mojibake
🤟
Encoding: GB18030 (hex bytes)
95 30 CE 35
RFC 5137
\u'1F91F'
Bash and Zsh inside echo -e
\U0001F91F
C and C++
\U0001F91F
C#
\U0001F91F
CSS
\01F91F
Excel
=UNICHAR(129311)
Go
\U0001F91F
JavaScript
\uD83E\uDD1F
Modern JavaScript since ES6
\u{1f91f}
JSON
\uD83E\uDD1F
Java
\uD83E\uDD1F
Lua
\u{1F91F}
Matlab
char(129311)
Perl
"\x{1F91F}"
PHP
\u{1f91f}
PostgreSQL
U&'\+01F91F'
PowerShell
`u{1F91F}
Python
\U0001F91F
Ruby
\u{1f91f}
Rust
\u{1f91f}
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