ampscript-debugging.html

%%[
 set @email = emailaddr
 if (@email != "") then
   set @rows = LookupRows("LeadsDataExtension","Email", @email)
   set @rowCount = rowcount(@rows)
   if @rowCount > 0 then 
     set @row = Row(@rows, 1)
     set @UID = Field(@row,"UID")
   endif
 endif
 ]%%
 <span style="color: green">@email:</span> %%=v(@email)=%%
 <span style="color: green">@rowCount:</span> %%=v(@rowCount)=%%
 <span style="color: green">@UID:</span> %%=v(@UID)=%%

@email: test@test.com
@rowCount: 0
@UID: