Need help in the text box

[#1]

Hi Friends,

Need help in the Text box object, the expression, as I trying to display if the "COD" has no value it should print "NIL".

But the following expression works but prints as "0", can you help me how to print as Nil if its 0

=If(Len(Trim([COD]=0)),Count({<[COD]={' '}>}[COD]),'Nil')

Regards

[#2]

if(isnull(COD)=-1,'nil',0)