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If And Only If Symbol In Math. Web the symbol $\iff$ means if and only if (iff) or implies and is implied by or is equivalent to.
Web the symbol $\iff$ means if and only if (iff) or implies and is implied by or is equivalent to.
Web the symbol $\iff$ means if and only if (iff) or implies and is implied by or is equivalent to. Web the symbol $\iff$ means if and only if (iff) or implies and is implied by or is equivalent to.
