===== Writing to communication log =====

There are 4 functions for writing to the communication log:
**INFO, ERROR, DEBUG, TRACE**

The functions add the **message** with the their respective detail level to communication log. Function returns 1 if any error occurred and 0 on success.

<code lua>
local result = getResult()

if (not result) then 
   ERROR("Nil was calculated in the getResult")
else 
   if (result > 100) then 
      DEBUG("The result is out of range...")
   end 
end 
</code>





==== Customize log output ====

You can implement your version of log output function with more complex formatting (e.g. table output or json output), wrapping the basics functions into your Lua code ([[useful_programs#debug_printing |see the example]]).
===== Writing to message log =====

**AddInfoMessage | AddWarningMessage | AddAlertMessage**(//message//, //userId//) 

The functions add the text //message// with their respective level to the messages log. //userId// is the user ID on whose behalf the message should be added. Returns 1 if an error occurred and 0 if successful.