# Enums Rust allows you to define types called "enums" which enumerate possible values. Enums are a feature in many languages, but their capabilities differ in each language. Rust’s enums are most similar to algebraic data types in functional languages, such as F#, OCaml, and Haskell. Useful in combination with enums is Rust's "pattern matching" facility, which makes it easy to run different code for different values of an enumeration. ## Further information - [Enums](https://doc.rust-lang.org/book/ch06-00-enums.html) - [Pattern syntax](https://doc.rust-lang.org/book/ch18-03-pattern-syntax.html)