U+FC37 "ﰷ" Arabic Ligature Kaf with Alef Isolated Form Unicode Character

U+FC37 "ﰷ" Arabic Ligature Kaf with Alef Isolated Form is a typographic ligature found in the Arabic Presentation Forms-A block, representing the joined written form of the Arabic letter Kaf (ك) followed by Alef (ا). It is typically used in specific calligraphic styles or legacy text rendering systems where the two characters are combined into a single glyph for visual continuity, notably when the ligature appears in its isolated position and does not connect to preceding or following letters. This character is part of a larger set of Arabic presentation forms that support complex script shaping, though its use has largely been replaced by modern Unicode normalization and shaping engine technologies.

General Properties

Code Point	U+FC37
Version Added	1.1
Name	Arabic Ligature Kaf with Alef Isolated Form
Block	Arabic Presentation Forms-A
General Category	Other Letter
Canonical Combining Class	Not Reordered
Bidirectional Class	Arabic Letter
Decomposition Type	Isolated
Decomposition Mapping	"ك" U+0643 Arabic Letter Kaf "ا" U+0627 Arabic Letter Alef

Encodings

HTML Decimal Encoding	ﰷ
HTML Hex Encoding	ﰷ
UTF-8 Encoding	0xEF 0xB0 0xB7
UTF-16 Encoding	0xFC37
UTF-32 Encoding	0x0000FC37
C/C++/Java Escape	\ufc37

Unicode Properties

NFC Quick Check	Yes
NFD Quick Check	Yes
Numeric Type	None
Numeric Value	NaN
Line Break	Alphabetic
Changes When NFKC Casefolded	Yes
NFKC Casefold	"ك" U+0643 Arabic Letter Kaf "ا" U+0627 Arabic Letter Alef
NFKC Simple Casefold	"ك" U+0643 Arabic Letter Kaf "ا" U+0627 Arabic Letter Alef
Script	Arabic
Script Extensions	Arabic
Indic Syllabic Category	Other
ID Start	Yes
XID Start	Yes
ID Continue	Yes
XID Continue	Yes
Alphabetic	Yes
Vertical Orientation	Rotated
Grapheme Base	Yes
Grapheme Cluster Break	Other
Word Break	Alphabetic letter
Sentence Break	OLetter