Programming a subroutine with absent parameters

[F_Laroche]

Hi,

I created the following subroutine:

subroutine haver(string %ticker, string %BD)

Is there a command that allow a parameter to be non-existant? For example, here I want my %BD parameter to have a value if it's not specified in the opening statement:

if @isobject(%BD)=0 then
%BD = "EMERGE G10 EMERGECW EMERGELA EMERGEMA EMERGEPR"
endif


Is that possible?

Thank you.

[EViews Gareth]

Code: Select all

if @len(%bd)=0 then
'blah blah blah
endif