How can I clear all the variables except one before restarting my program?

Is there a way to clear all of the variables except one when I end a game I wrote so that the next time it starts the variables have to be re-entered?

I have a program where it runs while program == 1, so when I ask the user if they want to play again, if they don't answer yes, then program = 0 and the program ends, so if I could clear all the variables except program, that would be super convenient.

[per isakson]

Search the File Exchange for keep

[Stephen23]

Better solution: write functions instead of scripts.

[Image Analyst]

Or save what you want to a .mat file. Then you can recall variables from the .mat file at each run. This method will even recall variables across different sessions of MATLAB, unlike methods using clear().

Answer 1

[Image Analyst]

Here's a snippet to study:

a = 10 % Declare sample variables.
b = 33;
result = 20;
% Get the names of the variables.
vars = whos
varNames = {vars.name};
celldisp(varNames);
% Let's loop over names, keeping the variable called "result"
for k = length(varNames): -1 : 1
  fprintf('Checking %s\n', varNames{k});
  if strcmp(varNames{k}, 'result')
    continue;
  end
  fprintf('    Deleting %s\n', varNames{k});
  clear(varNames{k});
end
clear ('k', 'varNames', 'vars'); % Get rid of loop iterator and other temporary items.