Return to input, how?

I'm trying to create an input form that takes two different answers. And when you type a wrong answer, I want it to go back to the input and start over.

My code is (the original text was in danish, so i put a bad english example in the forms):

value = input('Write hi or goodbye','s');
  if isequal(value, 'hi')
      fprintf('Hello\n');
  elseif isequal(value, 'goodbye')
      fprintf('see you\n');
  else
      fprintf('wrong answer try again!\n');
  end

So what can i do about the else statement? I was thinking about some message saying: The answer is incorrect, will you try again? (y/n)

Thanks in advance!

Answer 1

[Walter Roberson]

while true
  value = ...
  if ....
     break;
  else
     wrong answer
  end
end

Notice that there is no "break" for the case where you want it to loop back.

[Christian]

Awesome, it worked, but how about if I'm loading a file, and the file doesn't exist?

[Christian]

Nevermind i found out :) try catch end