What Is A Function

A Function is a piece of code that is called to perform a particular task, and will return a value to the calling script.

While there are many pre-defined functions such as StringToDateTime and FloatToStr, it is possible to create your own user-defined functions.   

• By default, pre-defined functions are classed as global functions, as they are part of the processing environment and as such do not need to be declared (or set-up).    

• Global functions are available throughout the system across all scripts.  

• Local functions are those that are only available and accessible in the script in which they are declared. 

• User-defined functions are classed as local functions by default.   However, it is possible to make a user-defined function available in multiple locations, by creating and declaring the function in an include file.