The word ""function"" in ""functional programming"" refers to mathematical concept of a function, but in this talk, I will pretend that that's not the case. Imagine that functional programming was instead inspired by functionalist architecture and the word ""function"" referred to the modernist design principle that ""form follows function"". How would this perspective transform our thinking about programming?

Using a number of practical F# examples, I will try to convince you that ""function"" in the design sense is already more useful for understanding what makes functional programming great than ""function"" in the mathematical sense. Along the way, I will go through a number of interesting language features and libraries available in F# that have close, but not quite equivalent cousins in Scala, including ""type providers"" which provide an easy way to integrate external data sources into the language.

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