Writing Comments

Question

Do you actually have to write what it is for the code to work? For example would the document comment actually have to say “this is a document comment” I am using Java

Answer 1

U don't need to write comments for a code to work , but sometimes to make understand others than what have U have done ... we need to write comments or To write informations like "author name , date etc" we write comments

Answer 2

As Gaurav pointed out these comments are not only for the original developer but they are also for those who do system analysis and troubleshooting.
================
The more complexed the coding the more comments should be directed pointing to where or what is being engaged / firing especially were several languages and activities are involved.

Answer 3

Code works without comments.
Comments are for the benefit of human developers reading the code. The Compiler will frankly ignore their existence.