We all know the basic idea of recursion, and we've feared it since we first started programming. In procedural, imperative languages, Rekursion is fortunately not necessary since there are built-in loop constructs. However, recursion is much cleaner, more compact and more expressive... if you do it right! In this session Oliver demonstrates how that works, and he explains the important technical aspects: tail recursion and Continuation Passing Style, or "how to avoid the dreaded stack overflow issues". As usual, very practical close to the code! Samples may be shown in C# and JavaScript, but this should not deter anybody since the ideas are quite universal.