Generally, one or a series of characters will tell the computer that text is a comment and not part of the program, though what those characters are will depend on the programming language being used. [substeps] For example, using the python language the hash or number sign indicates a comment.
[header] How to program [title] Understand comments. [step] Comments are text which does not appear or affect the program in any way. These are used by programmers to leave notes or information for themselves or future programmers.