At our second monthly F# SIG meeting, we’ll take an in-depth look at F#’s powerful support for recursion. We’ll practice simple idioms that make recursive functions easy and safe to write. We’ll learn to use F# tail recursion to make recursive functions as fast as non-recursive functions, with no risk of stack overflow. The Cleveland F# Programmers Special Interest Group (F# SIG) is for programmers who work in and/or are interested in learning the F# language. F# is Microsoft's entry in the fast-growing world of functional programming. Compared to other programming languages F# code is often simpler and more intuitive, yet like any language it takes some time and practice to learn F#. The F# SIG gives programmers at all skill levels a monthly opportunity to learn about the language and how others are using it, improve their skills and share their knowledge in a relaxed, cooperative environment . The group meetings consist of mini-presentations by members, group programming exercises, and informal discussions. The audience ranges from F# experts to those developers that are getting their first glimpse of F#.