Sub Procedures

A subroutine procedure is a sequence of ViviFire statements between the lines Sub and End.

The subroutine procedure does a task, then returns control to the code that called it (known as the “caller”). The procedure can return a value to the caller.

Each time the procedure is called, its statements run. It starts to run code with the first statement after Sub. It usually continues until the line End. But one of two statements can stop it: Exit Sub or Return.

You can make a procedure of type Sub in modules, classes, objects, and traits. It is private. It can be called only by other code in the same (1) class, (2) object, or (3) trait, or (if not one of the three) the module.

Procedures of type Sub can have arguments (constants, variables, or expressions) which the caller passes to it.

Declaration syntax

Sub sub_name [ parameter_list ]
    ' statements
End Sub

Parameter declaration

Parameters as local variables

TODO

Calling syntax

TODO

Example of declaration and call

TODO

See also

• Sub Statement
• Function Procedures
• Method Procedures
• Property Procedures
• Lambda Expressions