U+2A99 "⪙" Double-Line Equal to or Less-Than Unicode Character

U+2A99 "⪙" Double-Line Equal to or Less-Than is a mathematical symbol used to denote a relationship where a quantity is either equal to or less than another quantity, distinguished from the similar but more common "less-than or equal to" (≤) by having two horizontal parallel lines instead of one in its equal component. This symbol belongs to the Supplemental Mathematical Operators block and is typically employed in formal mathematical notation, particularly in contexts where precise relational distinctions are necessary, such as in advanced algebra, logic, or order theory. Its design provides a clear visual alternative for representing the "equal to or less-than" concept when a double-line style is preferred for consistency or legibility in technical documents.

General Properties

Code Point	U+2A99
Version Added	3.2
Name	Double-Line Equal to or Less-Than
Block	Supplemental Mathematical Operators
General Category	Math Symbol
Canonical Combining Class	Not Reordered
Bidirectional Class	Other Neutral
Mirrored	Yes
Mirrored Character	"⪚" U+2A9A Double-Line Equal to or Greater-Than

Encodings

HTML Decimal Encoding	⪙
HTML Hex Encoding	⪙
UTF-8 Encoding	0xE2 0xAA 0x99
UTF-16 Encoding	0x2A99
UTF-32 Encoding	0x00002A99
C/C++/Java Escape	\u2a99

Unicode Properties

NFC Quick Check	Yes
NFD Quick Check	Yes
NFKC Quick Check	Yes
NFKD Quick Check	Yes
Numeric Type	None
Numeric Value	NaN
Line Break	Alphabetic
Script	Common
Script Extensions	Common
Indic Syllabic Category	Other
Pattern Syntax	Yes
Math	Yes
Vertical Orientation	Rotated
Grapheme Base	Yes
Grapheme Cluster Break	Other
Word Break	Other
Sentence Break	Other