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I am trying to write a recursive code to check whether a string is palindrome or not, when i am running a trial case a error message shows up stating "he function call palindrome('madam') caused an error and did not complete (MATLAB:To​oManyOutpu​ts)".

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Harsh Mittal
Harsh Mittal on 20 Oct 2020
Commented: Harsh Mittal on 20 Nov 2020 at 7:42
% I am writing a code to find the palindrome of a string using recursion but i am getting the error The function call palindrome('madam') caused an error and did not complete (MATLAB:TooManyOutputs)
function palindrome(v)
if length(v) <= 1
true
return;
end
if v(1) ~= v(end)
false
return;
end
palindrome(v(2:end-1));
end

  2 Comments

John D'Errico
John D'Errico on 20 Oct 2020
Does your function actually return ANY output argument?
What happens when you just type false or true on the command line? Does that return anything? Or does it just dump something to the command window?
I think you need to do some reading about functions and how to use them.
When you write a function header, one thing you need to do is tell MATLAB what variables to return.

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Accepted Answer

Stephen Cobeldick
Stephen Cobeldick on 20 Oct 2020
If you want to return an output argument then it must be declared in the function, e.g.:
function out = palindrome(v)
if length(v) <= 1
out = true;
return
end
if v(1) ~= v(end)
out = false;
return
end
out = palindrome(v(2:end-1));
end
You still have a few more bugs to fix...

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