Methods and functions can be called with optional parameters. This means that within a method or function, any amount of parameters can be declared, and some parameters can be omitted when the method or function is called. Below shows a mapping of what the default value for a missing parameter would be depending on its declared type:

Declared Type | Default Value
----------------------------------
Variant ............. Undefined
Time ................ 00:00:00
Text ................. ""
Real .................. 0
Pointer .............. Nil
Picture .............. 0 octets
Object ............... null
Integer .............. 0
Date .................. 00/00/00
Collection ........... null
Boolean ............. False
Blob .................. 0 octets

This information can be useful for building methods with optional parameters or error checking.

Example: