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If or IF may refer to:

• If (preposition), a preposition used in English conditional sentences
• If (subordinator), a subordinator used for English subordinate interrogative clauses

Arts and entertainment

Film and television

• If.... (1968), a Lindsay Anderson film starring Malcolm McDowell
• IF (film), a 2024 fantasy film about imaginary friends
• If... (TV series), a series of BBC drama-documentaries
• "If..." (Desperate Housewives), a 2010 episode of Desperate Housewives
• Agar... If, a 1977 Indian thriller film

Gaming

• IF, a character in the Hyperdimension Neptunia game series
• Interactive fiction, text-based computer games featuring interactive stories and environments
• Shin Megami Tensei If..., a 1994 video game in the Shin Megami Tensei series
• Kill la Kill the Game: IF, a 2019 video game based on the Kill la Kill anime

Literature

• If (magazine), subtitled "Worlds of Science Fiction"
• IF Magazine, Inside Film, Australian magazine
• If... (comic), a political comic strip which appears in the UK newspaper The Guardian
• "If—" (published 1910), a poem by Rudyard Kipling
• The laconic phrase "If", a Spartan reply to a threat by Philip II

Music

• If (band), 1970s British progressive jazz-rock band
• In Flames, a melodic death metal band from Sweden, and a song from their album Lunar Strain
• I-F, stage name of Ferenc E. van der Sluijs, a Dutch producer and DJ

Albums

• If (Glass Hammer album), 2010 album by American band Glass Hammer
• If (If album), 1970 album by the English band If
• if (Mindless Self Indulgence album), a 2008 album recorded by Mindless Self Indulgence
• (if), a 2009 album by Diary of Dreams
• If..., a 2011 orchestral concept album by Bill Ryder-Jones
• ‘’If…’’, a 1992 album by English band Scorpio Rising

Songs

• "If..." (The Bluetones song), 1998
• "If" (Bread song), 1971, covered by many artists, including a UK #1 by Telly Savalas in 1975
• "If" (French Kiss song), 2011
• "If" (Glasvegas song), 2013
• "If" (Janet Jackson song), 1993
• "If" (Kana Nishino song), 2010
• "If" (Pink Floyd song), 1970
• "If (Mata Aetara)", by Day6, 2018
• "If (They Made Me a King)", written by Tolchard Evans, Robert Hargreaves and Stanley J. Damerell, 1934; notably recorded by Perry Como, 1950
• "If", by Jeri Lynne Fraser (as Jeri Lynn), 1959
• "If", by Femme Fatale from Femme Fatale, 1988
• "If", by The Cult from Ceremony, 1991
• "If", by Joe Satriani from his 1995 self-titled album
• "If...", by The Divine Comedy from A Short Album About Love, 1997
• "If", by Bananarama from Exotica, 2001
• "If", by Destiny's Child from Destiny Fulfilled, 2004
• "If", by Red Hot Chili Peppers from Stadium Arcadium, 2006
• "If", by Freemasons from Unmixed, 2007
• "If", by Joni Mitchell from Shine, 2007
• "If", by Davido, 2017
• "If", by R5 from New Addictions, 2017

Business and organizations

• If (insurance company), in the Nordic countries
• IF Metall, a trade union in Sweden
• Illuminati Films, an Indian motion picture production, based in Mumbai
• Independent Fabrication, a bicycle manufacturer
• Intelligent Finance, a bank
• Interflug (1958–1991; IATA airline designator IF)
• International Federation, any of several world sport governing bodies
• International Forum Design (iF), a society best known for its iF design awards
• Islamic Front (Syria), Sunni Islamist rebel group involved in the Syrian Civil War
• Islas Airways (founded 2002; IATA airline designator IF)

Science and technology

Biology and medicine

• I_f current, a component current in the cardiac pacemaker potential
• Immunofluorescence, a form of labeling substances with fluorescent antibodies
• Initiation factor, an important component in protein synthesis
• Intermediate filament, a component of the cytoskeleton
• Interstitial fluid, the liquid outside of a cell
• Intrinsic factor, produced by the stomach

Computing and mathematics

• If-then-else, a conditional statement in computer programming
• IF (x86 flag), the Interrupt Flag in the x86 processor architecture
• Information filter, or inverse covariance filter, in Kalman filtering
• Interface (computing), a shared boundary across which components of a computer system exchange information
• Intermediate form, a type of data structure in computer programming

Other uses in science and technology

• Information filtering system, which removes redundant or unwanted information at a semantic level
• Intelligent falling, a satirical "alternative theory" of gravitation
• Intermediate frequency, in radio transmission or reception
• Internal focusing, a lens technology in which focusing occurs only with internal elements
• Iodine monofluoride, an unstable interhalogen inorganic compound
• International Fujita scale (IF-scale), a scale to rate a tornado's intensity

Other uses

• If, a small island in the Bay of Marseille, France; location of the Château d'If
• If, a prominent example of a laconic phrase
• Impact factor, a measure reflecting the average number of citations to articles published in scholarly journals
• Intellectual freedom, a right to access, explore, consider, and express ideas and information
• Intermittent fasting, a diet having recurring periods of fasting
• Internally Flawless, a grade of diamond clarity
• Inside forward, a position in association football
• Ilfov County (except Bucharest), on the vehicle registration plates of Romania

See also

• If and only if, iff, logical statement indicating necessary and sufficient conditions
• IFF (disambiguation)
• IFS (disambiguation)
• All pages with titles beginning with If

• Disambiguation pages