⇔

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⇔	U+21D4, ⇔ LEFT RIGHT DOUBLE ARROW

← ⇓
[U+21D3]

⇕ →
[U+21D5]

Translingual

Symbol

English Wikipedia has an article on:

Logical equivalence

⇔

(logic) if and only if

Synonyms

(if and only if): ↔

Related terms

Arrows in Unicode (hexadecimal range 0x2190–0x21ff)

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