If – mainly a conjunction; sometimes a noun
If – an introduction to a conditional clause
If – a statement around a condition; a presumption, supposition, provision, precondition, proviso, requirement, specification, stipulation, or restriction
If – an assumption leading to an event or outcome
If – delivering a possibility, request, or opinion
If – an implied reservation
If – as in although, yet, despite being, even though, or but – many times serving as an excuse
If – noun as uncertainty, doubt
If – a function in programing to make a decision
If – a 1910 poem by Rudyard Kipling
If – a 1968 movie starring Malcolm McDowell
If – a BBC drama-documentary series
“If” – a 2010 episode of Desperate Housewives
If – a magazine subtitled “Worlds of Science Fiction”
If – a political comic strip appearing The Guardian (a UK newspaper)
If (band), 1970s British progressive jazz-rock band, and the name of their album
If – songs by Bananarama, Bread, Janet Jackson, Joni Mitchell, Red Hot Chili Peppers, Pink Floyd, Perry Como, Destiny’s Child, Rivermaya, Davido, and more.
If – what if I had answered my own challenge with in a way other than my own.
NOTE: I encourage readers to follow the pingback links in the Comments to other posts about If that answer the If Challenge.