Use of "return" in simple if statement

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

[Image Analyst]

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.

Answer 1

[Walter Roberson]

If you do not "return" then the rest of the function would be executed.

[Neha]

Maybe this is off topic but I could not find the solution anywhere else. What is the equivalent command in R for "return"? I am new to programming so please do not mind if this is a very basic question. Thanks in advance! :)

[Guillaume]

You'll be better off asking a forum dedicated to R!

[Walter Roberson]

Looking at https://cran.r-project.org/doc/manuals/r-release/R-lang.html#Scope I see

return(g)

This tells me that R has return() and that typically you would need to tell it what to return.

Answer 2

[Evgeny Pr]

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

[MiauMiau]

thanks