Using a library and functions

Overview

GELLO allows the creation of Libraries and functions. A library is a collection of non volatile resources which in this case is for the consistent implementation and reuse of code. It is useful to tuck away snippets of code for commonly used methods or to hide the complexity of large and occasionally used code. This tutorial will demonstrate two examples of the former, one of the latter and then bring them together  by way of worked examples.

Calculate patient age

In an earlier tutorial we wrote GELLO to calculate the age of a patient in years from the VMR instance's date of birth.