> For the complete documentation index, see [llms.txt](https://haskell.hpmeducation.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://haskell.hpmeducation.com/cutom-types.md).

# Cutom Types

- [Declaring Types](https://haskell.hpmeducation.com/cutom-types/declaring-types.md)
- [Type Synonyms](https://haskell.hpmeducation.com/cutom-types/declaring-types/type-synonyms.md)
- [Data Declarations](https://haskell.hpmeducation.com/cutom-types/declaring-types/data-declarations.md)
- [Newtype declarations](https://haskell.hpmeducation.com/cutom-types/declaring-types/newtype-declarations.md)