Noob question -- On error, exit function and terminate script

[marbux <marbux@...>]

Hi, all,

I've spent a couple of hours now looking for the answer without
success. Is there a simple method to terminate a script upon an error
condition that occurs within a function, E.g.,

function foo(bar)
   if bar == ""
      ???
   end
   ...
end

Appreciate any guidance here.

Best regards,

Paul