.. meta::
  :description: Wired API, handling return values
  :keywords: Wired, xml, api, channel manager, booking engine, return values

Return values
*************

Return values are shared between all procedures and have always the same format:

.. code-block:: python

  ReturnCode, Info= function() 

which is generally rendered by many programming languages as an array of two elements.

The first one, *ReturnCode*, is always an integer. In particular, **for succesfull operations, and only 
for them, ReturnCode is zero.**

The second element, *Info*, changes depending by the called procedure.

When ReturnCode is less than zero, something wrong happened. In that case, 
**info is a string and contains a Human Readable Error**: this way you
can better understand what happened.

When operations are succesfull, *Info* basically depends from a simple
condition: does the called function need to return something? If the
function does not need to return data (for example functions used to
update availability), *Info* is generally a string, 
like **Ok**. 

For functions returning data (for example functions that return 
reservations), *Info* can be an Integer, a String or even a 
Complex Structure (like arrays or KV structs): check the 
:doc:`onboarding` section for more info.