Use of "return" in simple if statement

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Hi
I have of course read the explanations regarding the return statement. Still in the following case:
if (parameter < 1)
disp('Wrong parameters...');
return
end
I don't see what difference it makes if we use "return" here or we dispense with it..
Thanks
  1 Comment
Image Analyst
Image Analyst on 25 Jan 2013
Just a suggestion - instead of disp() you might use
uiwait(warnglg('Wrong parameters...'));
I think it's a little nicer to have a popup message box. Better yet, use sprintf() to create your string and tell your users what they entered and what the valid range is.

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Accepted Answer

Walter Roberson
Walter Roberson on 25 Jan 2013
If you do not "return" then the rest of the function would be executed.
  3 Comments
Walter Roberson
Walter Roberson on 7 Mar 2017
return(g)
This tells me that R has return() and that typically you would need to tell it what to return.

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More Answers (1)

Evgeny Pr
Evgeny Pr on 25 Jan 2013
Edited: Evgeny Pr on 25 Jan 2013
You need to use ERROR function, do not return:
function myfunc(parameter)
if (parameter < 1)
error('Wrong parameters...');
end
% continue
end
...or:
function myfunc(parameter)
if (parameter < 1)
disp('Wrong parameters...');
else
% continue
end
end

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