This character is a Other Letter 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 is written as Arabic letter from right to left. When changing direction it is not mirrored. The word that U+0643 forms with similar adjacent characters prevents a line break inside it. The glyph can be confused with 43 other glyphs.
The Wikipedia has the following information about this codepoint:
Kaph (also spelled kaf) is the eleventh letter of the Semitic abjads, including Arabic kāfك, Aramaic kāp 𐡊, Hebrew kāp̄כ, Phoenician kāp 𐤊, and Syriac kāp̄ ܟ.
The Phoenician letter gave rise to the Greek kappa (Κ), Latin K, and Cyrillic К.
Representations
System
Representation (click value to copy)
Nº
1603
UTF-8
D9 83
UTF-16
06 43
UTF-32
00 00 06 43
URL-Quoted
%D9%83
HTML hex reference
ك
Wrong windows-1252 Mojibake
Ùƒ
Encoding: CP720 (hex bytes)
E8
Encoding: CP1256 (hex bytes)
DF
Encoding: GB18030 (hex bytes)
81 31 86 37
Encoding: ISO8859_6 (hex bytes)
E3
Encoding: CP420 (hex bytes)
AF
Adobe Glyph List
afii57443
Adobe Glyph List
kafarabic
digraph
k+
RFC 5137
\u'0643'
Bash and Zsh inside echo -e
\u0643
C and C++
\u0643
C#
\u0643
CSS
\000643
Excel
=UNICHAR(1603)
Go
\u0643
JavaScript
\u0643
Modern JavaScript since ES6
\u{643}
JSON
\u0643
Java
\u0643
Lua
\u{643}
Matlab
char(1603)
Perl
"\x{643}"
PHP
\u{643}
PostgreSQL
U&'\0643'
PowerShell
`u{643}
Python
\u0643
Ruby
\u{643}
Rust
\u{643}
Click the star button next to each label to set this representation as favorite or remove it from the favorites. Favorites will be shown initially. (Favorites are stored locally on your computer and never sent over the internet.)