0x21D0
0x21D0 is the hexadecimal notation for the Unicode code point U+21D0, which represents the LEFTWARDS DOUBLE ARROW character. The glyph for this code point is ⇐, and it resides in the Unicode Mathematical Operators block. It is used in mathematics and logic to denote implication or a relation that runs in the reverse direction, with the forward implication commonly shown by the related symbol U+21D2 (⇒).
In practice, 0x21D0 is encountered in authoring and rendering mathematical notation, formal grammars, and logical expressions.
Encoding and representations: U+21D0 can be encoded in UTF-8 as the three-byte sequence E2 87 90. In
Related symbols include U+21D2 RIGHTWARDS DOUBLE ARROW (⇒) and U+21D4 LEFT RIGHT DOUBLE ARROW (⇔), which together cover