The program structure

Each program begins with a set of headline comments containing :

- the program title

- the purpose of the routine

- the method and algorithms used

- the detail of input and output interfaces

- the external routines and functions used (if they exist)

- references (if they exist)

- the author name(s), the date of creation and any updates.

- Each program is split into several well separated sections and sub-sections with an underlined title and specific labelled statements.

- A program has not more than 200 to 300 lines.

A template of a module style can be found on the NEMO depository in the following file : NEMO/OPA_SRC/module_example.