Learn how to use the strong type system of F# to your advantage – not only to check for correctness, but also in iterative development with short feedback cycles. You can use the type system to get rapid feedback about design ideas and implementation details, but also to get guidance on what to do next. Due to F#’s strong type inference, the type system of the language can be used in ways not available in C#, Java, or similar strongly typed languages. Learn how to combine the safety of static typing with the ease of development typically only offered by dynamically typed languages. The combination though, is even stronger than the mere sum of its parts.