iff

See also: IFF

English

Pronunciation

• (UK) IPA^(key): /ɪf ən(d) ˈəʊn.lɪ ɪf/
• (US) IPA^(key): /ɪf ən(d) ˈoʊn.lɪ ɪf/

Etymology 1

Conjunction

iff

1. (mathematics, logic) Short for if and only if.

   A rectangle is a square iff all four of its sides have the same length.

Related terms

• if

Translations

abbreviation of if and only if

• Danish: hviss
• Dutch: desda
• Finnish: joss (fi)
• French: ssi (fr)
• German: gdw.
• Hebrew: אםם‎ (he)
• Hungarian: acsa
• Norwegian: hviss (no)
• Polish: wtw
• Portuguese: sse, sss
• Romanian: ddacă
• Russian: титтк (tittk)
• Spanish: sii
• Swedish: omm (sv)

Etymology 2

Conjunction

iff

1. Obsolete spelling of if.
   • 1565, Thomas Stapleton, A Fortreſſe of the Faith &c., Ihon Laet, the 2. part. 112:

     For iff the patient be aſhamed to diſcloſe hiſ wounde to the phyſician which knoweth it not , phyſicke can not helpe him.

Anagrams

• FFI, FIF, Fif.