MATLAB: How to ask user before overwriting a text file

Question

Hi, I want to write some data from MATLAB to a text file. But I want if the text file existed, ask the user if they want to overwrite the text file. Any suggestion?

Thanks

P.S. I'm writing the text files using:

fileID = fopen('Test.txt','w');    
fprintf(fileID,'Hello!');

Answer 1

if exist('Test.txt','file')
   %%do what you want
end

doc exist

You have to check this before opening file for writing, else it opens fresh file after fopen.