Documentation comnents

Question

What are documentation comments and what are they used for

Answer 1

In Java they are enclosed in
/**

*/
These are mostly use to describe different components of a solution or to create how to do help. Using javadoc utility, using these comments HTML page is generated.

Answer 2

documentation comments are defined with xml tags and give your code fully and structured explanation to users. when you call a function you see a summary of function and it's parameters.
for example for c#:

https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/xmldoc/recommended-tags-for-documentation-comments