U+21EE "⇮" Upwards White Double Arrow Unicode Character

U+21EE "⇮" Upwards White Double Arrow is a typographic symbol belonging to the Arrows block, designed to represent a doubled upward pointing arrow with a white, unfilled outline. This glyph is commonly used in mathematics, computer science, and formal logic to denote a strong or doubled implication, mapping, or transformation in the upward direction, often signifying a bidirectional or reinforced relationship. Its visual appearance, with two parallel arrowheads pointing upward, distinguishes it from single arrows and can be employed in diagrams, user interfaces, or technical documentation to indicate upward navigation, scrolling, or an amplified directional cue. The character’s open body is intended to provide clarity when displayed against various backgrounds, making it a functional element in specialized notation systems.

General Properties

Code Point	U+21EE
Version Added	3.0
Name	Upwards White Double Arrow
Block	Arrows
General Category	Other Symbol
Canonical Combining Class	Not Reordered
Bidirectional Class	Other Neutral

Encodings

HTML Decimal Encoding	⇮
HTML Hex Encoding	⇮
UTF-8 Encoding	0xE2 0x87 0xAE
UTF-16 Encoding	0x21EE
UTF-32 Encoding	0x000021EE
C/C++/Java Escape	\u21ee

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
Vertical Orientation	Rotated
Grapheme Base	Yes
Grapheme Cluster Break	Other
Word Break	Other
Sentence Break	Other