Leftwards Double Arrow Symbol

A symbol from the Arrow Symbols collection. Click the symbol or the button below to copy.

Symbol: ⇐
Unicode: U+21D0
HTML entity: ⇐
Category: Arrow Symbols

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11 of 84 in the arrow symbols collection

About the leftwards double arrow symbol

The leftwards double arrow signifies a strong implication or logical equivalence in the reverse direction, often used in mathematics and formal logic to denote "if and only if" when paired with its rightward counterpart. It also appears in technical diagrams and notation to represent a bidirectional relationship or a two-way mapping, particularly in contexts like set theory or computer science. Outside of specialized fields, this character is less common in everyday text, but it may be employed in user interfaces or documentation to indicate a return or backward navigation function.

How to type Leftwards Double Arrow

Native keyboard shortcuts for each operating system — derived from the codepoint, so the steps below are always accurate.

Windows

2 options

In Word / Outlook: type 21D0 then press Alt + X.
Anywhere: press Win + . to open the emoji & symbol picker, then search.

macOS

2 options

Enable “Unicode Hex Input” in System Settings → Keyboard, then hold Option and type 21D0.
Or: Control + Command + Space opens the Character Viewer — search by name.