This character is a Nonspacing Mark and is mainly used in the Arabic script.
The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it acts as Nonspacing Mark. When changing direction it is not mirrored. U+06DC prohibits a line break before it.
The Wikipedia has the following information about this codepoint:
The Qur'an (lit. recitation) is meant to be recited. Its verses are divided according to the rhythm of the language. The Qur'anic punctuation is, therefore, not only based on the structure or the syntax of the sentence, but also on the need to pause, for breath or for effect. Pickthall observes, when a certain sound which marks the rhythm recurs, there is a strong pause and the verse ends naturally, although the sentence may go on to the next verse. Thus the Qur'anic punctuation affects the pronunciation of the words, rhythm, intonation and syllable separation.
Representations
System
Representation (click value to copy)
Nº
1756
UTF-8
DB 9C
UTF-16
06 DC
UTF-32
00 00 06 DC
URL-Quoted
%DB%9C
HTML hex reference
ۜ
Wrong windows-1252 Mojibake
◌ۜ
Encoding: GB18030 (hex bytes)
81 31 96 30
RFC 5137
\u'06DC'
Bash and Zsh inside echo -e
\u06DC
C and C++
\u06DC
C#
\u06DC
CSS
\0006DC
Excel
=UNICHAR(1756)
Go
\u06DC
JavaScript
\u06DC
Modern JavaScript since ES6
\u{6dc}
JSON
\u06DC
Java
\u06DC
Lua
\u{6DC}
Matlab
char(1756)
Perl
"\x{6DC}"
PHP
\u{6dc}
PostgreSQL
U&'\06DC'
PowerShell
`u{6DC}
Python
\u06DC
Ruby
\u{6dc}
Rust
\u{6dc}
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