If

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

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)

Biology and medicine

 * If 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