u can only look at the
          file's content, not change it.
        </li>
        <li>
          <strong>'w'</strong> (Write): Opens the file for writing. It erases all existing content if the file already
          exists. If the file doesn’t exist, it creates a new one.
        </li>
        <li>
          <strong>'a'</strong> (Append): Opens the file to add (append) new content at the end without deleting
          anything. If the file doesn’t exist, it creates a new one.
        </li>
        <