ASP.NET C# Database Other Languages VB.NET Articles Introduction to Functional Programming For .NET developers... Here's your first crack at F#, interesting stuff and some different syntax, but another language for your toolbelt. This is an MSDN Magazine article from April 2010. Learn you a Haskell... Haskell is a purely functional programming language. In imperative languages you get things done by giving the computer a sequence of tasks and then it executes them. While executing them, it can change state. For instance, you set variable a to 5 and then do some stuff and then set it to something else.