By output text, do you mean comments, or the output from a program?
If you don't intend to do anything with the text, hide it with comment tags <!-- TEXT HERE --> , or if you want the text to be used in a form you are submitting use <input type="hidden" name="mytext" value="TEXT HERE">
There may be other options you can use, depending on what it is you are trying to achieve. If you want, provide some more details, and I'm sure someone here will be able to offer some further advice.