User Defined Types

Abstract

The aim of this chapter is to introduce the concepts and ideas involved in using the facilities offered in Fortran 90 for the construction and use of user defined types:

• the way in which we define our own types;

• the way in which we declare variables to be of a user defined type;

• the way in which we manipulate variables of our own types;

• the way in which we can nest types within types.

The examples are simple and are designed to highlight the syntax. More complex and realistic examples of the use of user defined data types are to be found in later chapters.