This character is a Nonspacing Mark and inherits its script property from the preceding character. It is also used in the scripts Arabic, Syriac.
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+064D prohibits a line break before it. The glyph can be confused with one other glyph.
The Wikipedia has the following information about this codepoint:
Nunation (Arabic: تَنوِين, tanwīn), in some Semitic languages such as Literary Arabic, is the addition of one of three vowel diacritics (ḥarakāt) to a noun or adjective.
This is used to indicate the word ends in an alveolar nasal without the addition of the letter nūn. The noun phrase is fully declinable and syntactically unmarked for definiteness, identifiable in speech.
Representations
System
Representation (click value to copy)
Nº
1613
UTF-8
D9 8D
UTF-16
06 4D
UTF-32
00 00 06 4D
URL-Quoted
%D9%8D
HTML hex reference
ٍ
Wrong windows-1252 Mojibake
â—ŒÙ
Encoding: CP720 (hex bytes)
F3
Encoding: CP1256 (hex bytes)
F2
Encoding: GB18030 (hex bytes)
81 31 87 37
Encoding: ISO8859_6 (hex bytes)
ED
Adobe Glyph List
afii57453
Adobe Glyph List
kasratanarabic
digraph
=+
RFC 5137
\u'064D'
Bash and Zsh inside echo -e
\u064D
C and C++
\u064D
C#
\u064D
CSS
\00064D
Excel
=UNICHAR(1613)
Go
\u064D
JavaScript
\u064D
Modern JavaScript since ES6
\u{64d}
JSON
\u064D
Java
\u064D
Lua
\u{64D}
Matlab
char(1613)
Perl
"\x{64D}"
PHP
\u{64d}
PostgreSQL
U&'\064D'
PowerShell
`u{64D}
Python
\u064D
Ruby
\u{64d}
Rust
\u{64d}
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