What are comments in Java?

What are comments in Java?

• A. They are executable statements that run at runtime
• B. They must be enclosed in quotation marks
• C. They are data declarations
• D. They are explanatory statements included in code to help readers understand how it works

Answer: (D)

Comments are explanatory notes in the source code that are ignored by the compiler, so they don’t affect how the program runs. They’re there to help someone reading the code understand what it does or why a particular implementation was chosen. In Java you can write a single-line comment with //, a multi-line comment with /* ... */, or a Javadoc comment with /** ... */ for generating documentation. Use comments to describe the purpose of classes, methods, parameters, or any tricky logic, and to leave notes for future readers. They’re not data declarations or executable statements; writing text in quotes would create a string instead of a comment.

Comments are explanatory notes in the source code that are ignored by the compiler, so they don’t affect how the program runs. They’re there to help someone reading the code understand what it does or why a particular implementation was chosen. In Java you can write a single-line comment with //, a multi-line comment with /* ... /, or a Javadoc comment with /* ... */ for generating documentation. Use comments to describe the purpose of classes, methods, parameters, or any tricky logic, and to leave notes for future readers. They’re not data declarations or executable statements; writing text in quotes would create a string instead of a comment.