Published May 6, 2021Updated Dec 21, 2022
Contribute to Docs

A comment is a piece of text within a program that is not executed. It can be used to provide additional information to aid in understanding the code.

Single-line Comments

Single-line comments are created using two consecutive forward slashes. The compiler ignores any text after // on the same line.

// This line will denote a comment in C++

Multi-line Comments

Multi-line comments are created using /* to begin the comment, and */ to end the comment. The compiler ignores any text in between.

This is all commented out.
None of it is going to run!

Codebyte Example

Here’s a program with a multi-line comment and two single-line comments:


All contributors

Looking to contribute?

Learn C++ on Codecademy