What does iff mean?
Iff means (mathematics, logic) Abbreviation of if and only if..
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/ɪf ən(d)ˈəʊn.li ɪf/ · conjunction
(mathematics, logic) Abbreviation of if and only if..
A rectangle is a square iff all four of its sides have the same length.
For iff the patient be aſhamed to diſcloſe hiſ wounde to the phyſician which knoweth it not , phyſicke can not helpe him.
Use iff when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Iff means (mathematics, logic) Abbreviation of if and only if..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
A rectangle is a square iff all four of its sides have the same length.
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