Question

Consider the following code

x = y+3;

y = input(‘??’);

What can I do to ask the user to continue or not, if yes then it prompt the input function for y again, if no then terminate the program.

Answer 1

Try this:

while true
  % Do stuff
  inp = input('Continue? (y/n) ', 's');
  if ~strcmp(inp, 'y')
    break;
  end
end

Edit: Based on our discussion, I’m adding an example of how you could structure a Matlab file with two functions, a main function running the above loop, and a helper function that is called inside the loop.

function main()
  while true
    inp = input('Enter y: ', 's');
    y = str2double(inp);
    helper(y)
    inp = input('Continue? (y/n) ', 's');
    if ~strcmp(inp, 'y')
      break;
    end
  end
end

function helper(y)
  x = y + 3;
  fprintf('x = %.2f\n', x);
end

More info on Matlab functions here.