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554 bytes added ,  11:14, 24 August 2016
add section for error messages
44.04 55.05 6.06];
</pre>
 
== Error messages ==
 
When you encounter an error condition, call the function {{codeline|error}}
(or {{codeline|print_usage}}). The {{codeline|error}} and {{codeline|print_usage}} functions
do not return. It is customary to prefix the error message
with the name of the function that generated it. For example:
 
<pre>error ("my_cool_function: input A must be a matrix");</pre>
 
Octave has several functions that produce error messages according
to the Octave guidelines. Consider using {{codeline|inputParser}}
and {{codeline|validateattributes}}.
== Naming ==

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