Leftwards Arrow From Bar Symbol

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

Arrow Symbols collection

Symbol: ↤
Unicode: U+21A4
HTML entity: ↤
Category: Arrow Symbols

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23 of 84 in the arrow symbols collection

About the leftwards arrow from bar symbol

This symbol denotes a leftward arrow with a vertical bar at its tail, often used in mathematics and logic to represent a function or mapping from a domain to a codomain, or to indicate a specific type of arrow in formal diagrams. It appears in technical documents, particularly in proofs or set theory, where it may signify an injection or a left-pointing map distinct from a standard arrow.

How to type Leftwards Arrow From Bar

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 21A4 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 21A4.
Or: Control + Command + Space opens the Character Viewer — search by name.