Variable number of parameters for a function?

Kind of.

Basically, in your function definition, you can give some variable default parameters, like this:

Function PrintLines(Message$, howmany% = 1)
...

Notice the " = 1" assignment in the function definition. This means that if you call the function without specifying a second parameter, it will use the value 1 as the second parameter. If you do specify it, it will be whatever you sent. Here's a working code example:

PrintLines("Hello")
PrintLines("Echo", 5)

Function PrintLines(Message$, howmany% = 1)
	For i% = 1 To Abs(howmany)
		Print Message
	Next
End Function

So, as you can see, it's kind of a "variable" number of parameters, though it's not truly, since all parameters are specified one way or another, just not necessarily by you.

Note that if you have a function with default parameters, every parameter after the first default parameter must also have a default parameter. That is to say, this will not work:

Function PrintLines(Message$="", howmany%) ; <--- WON'T WORK
...

Dig it?