Two types of comments are allowed in a JSP page - - hidden and output comments. A hidden comment will not appear in the generated output whereas an output comment will appear in the generated output.
This example shows a hidden comment:
A restriction for hidden comments is that the comment string cannot contain the character sequence --.
This example shows an output comment:
Similar to hidden comments, output comments cannot contain the character sequence --. Output comments can contain dynamic content:
Output:
