Ceylon is a general-purpose, imperative, statically-typed, block-structured, object-oriented, higher-order language featuring a syntax similar to Java and C#, and a type system based on the notion of principal types. It claims to be a programming language for writing large programs in a team environment, being highly readable, typesafe, and easy to learn for programmers who are familiar with mainstream languages used in business computing. Ceylon has a full-featured Eclipse-based development environment, allowing developers to take best advantage of the powerful static type system. Programs written in Ceylon execute on any JVM.