2018 | OriginalPaper | Chapter 17. Introduction to Derived Types Authors: Ian Chivers, Jane Sleightholme Publisher: Springer International Publishing Log in Published in: Introduction to Programming with Fortran » Get access to the full version Abstract The aim of this chapter is to introduce the concepts and ideas involved in using the facilities offered in modern Fortran for the construction and use of derived or user defined types; defining our own types. declaring variables to be of a user defined type. manipulating variables of our own types. nesting types within types.