Double Left Right Arrow Iff symbol
Type :double_left_right_arrow_iff: · Arrows
Unicode name Left Right Double Arrow · Arrows block · added in Unicode 1.1, 1993
What ⇔ is for
Material equivalence: each side implies the other, read as "if and only if" and often written iff in text. One of the few arrows with a precise, agreed meaning.
How to type ⇔
The shortcuts below are the built-in routes. With
Emoji Anywhere
installed you can skip all of them and type
:double_left_right_arrow_iff: in any text field instead, which
is the same on every platform.
macOS
No direct shortcut. Use Edit → Emoji & Symbols, or switch to the Unicode Hex
Input source and type 21D4 with Option
held.
Windows
No Alt code. In Word, type 21D4 then press Alt +
X. Elsewhere use the emoji panel with Win + Period, or Character Map.
Shortcodes
:double_left_right_arrow_iff: On the web
HTML ⇔
Unicode U+21D4
JavaScript '\u{21D4}'
CSS "\21D4"
Python '\u21D4'
URL %E2%87%94
What ⇔ gets mistaken for
A two-way relationship with no logical claim attached. Fine for a sync or a swap.
More from arrows
:down_right_arrow: ↙ :down_left_arrow: ⇒ :implies: ⇐ :double_left_arrow: ⇑ :double_up_arrow: ⇓ :double_down_arrow: ⟶ :long_right_arrow: ⟵ :long_left_arrow: ↳ :arrow_down_then_right_reply: ↵ :return_arrow: ⤴ :arrow_curving_up: ⤵ :arrow_curving_down: Every symbol and kaomoji is in the full gallery .
Tired of copying ⇔ from pages like this one?
That is exactly what the extension removes. Here is the whole interaction, in every text field you already use:
You type
You get
Your keyboard already knows what you mean
Free, 290 KB, no account. Two letters from now you will never open an emoji panel again.
