OpenOffice.org BASIC Guide.pdf - OpenOffice.org wiki

Loops 32
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Principal Authors: Fpe, Ccornell, TJFrazier
Procedures and Functions
Procedures and functions form pivotal points in the structure of a program. They provide
the framework for dividing a complex problem into various sub-tasks.
Procedures
A procedure executes an action without providing an explicit value. Its syntax is
Sub Test
' ... here is the actual code of the procedure
End Sub
The example defines a procedure called Test that contains code that can be accessed from
any point in the program. The call is made by entering the procedure name at the relevant
point of the program.
Functions
A function, just like a procedure, combines a block of programs to be executed into one
logical unit. However, unlike a procedure, a function provides a return value.
Function Test
' ... here is the actual code of the function
Test = 123
End Function
The return value is assigned using simple assignment. The assignment does not need to be
placed at the end of the function, but can be made anywhere in the function.
The preceding function can be called within a program as follows:
Dim A
A = Test
The code defines a variable A and assigns the result of the Test function to it.