This character is a Currency Symbol and is commonly used, that is, in no specific script.
The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it is written as end of a European number, e.g., a currency symbol, from left to right. When changing direction it is not mirrored. U+20B9 prohibits a line break after it, if it is followed by a number.
The CLDR project calls this character “indian rupee” for use in screen reading software. It assigns these additional labels, e.g. for search in emoji pickers: currency, indian, rupee.
The Wikipedia has the following information about this codepoint:
The Indian rupee sign ⟨₹⟩ is the currency symbol for the Indian rupee (ISO 4217: INR), the official currency of India. Designed by D. Udaya Kumar, it was presented to the public by the Government of India on 15 July 2010, following its selection through an open competition among Indian residents. Before its adoption, the most commonly used symbols for the rupee were ⟨Rs⟩, ⟨Re⟩ or, in texts in Indian languages, an appropriate abbreviation in the language used.
The design is based on the Devanagari letter ⟨र⟩ (ra) with a double horizontal line at the top and the Latin capital letter ⟨R⟩ without its vertical bar.
Representations
System
Representation (click value to copy)
Nº
8377
UTF-8
E2 82 B9
UTF-16
20 B9
UTF-32
00 00 20 B9
URL-Quoted
%E2%82%B9
HTML hex reference
₹
Wrong windows-1252 Mojibake
₹
Encoding: GB18030 (hex bytes)
81 36 B4 34
AGL: Latin-4
uni20B9
AGL: Latin-5
uni20B9
RFC 5137
\u'20B9'
Bash and Zsh inside echo -e
\u20B9
C and C++
\u20B9
C#
\u20B9
CSS
\0020B9
Excel
=UNICHAR(8377)
Go
\u20B9
JavaScript
\u20B9
Modern JavaScript since ES6
\u{20b9}
JSON
\u20B9
Java
\u20B9
Lua
\u{20B9}
Matlab
char(8377)
Perl
"\x{20B9}"
PHP
\u{20b9}
PostgreSQL
U&'\20B9'
PowerShell
`u{20B9}
Python
\u20B9
Ruby
\u{20b9}
Rust
\u{20b9}
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