C++ Comments

Comments in C++ are used to explain the code and make it easier to understand. Comments are ignored by the compiler, which means they do not affect the execution of the program.

Programmers use comments to describe what the code does, making it easier for others (and themselves) to read and maintain the program.

Single-Line Comments

A single-line comment starts with two forward slashes //. Everything after // on that line is treated as a comment.

// This is a single-line comment

Example

#include <iostream>
using namespace std;

int main() {

    // Print a message to the screen
    cout << "Hello, World!";

    return 0;
}

Multi-Line Comments

Multi-line comments are used to write longer explanations. They start with /* and end with */.

/*
This is a multi-line comment
It can span multiple lines
*/

Example

#include <iostream>
using namespace std;

int main() {

    /*
    This program prints a message
    to demonstrate multi-line comments
    */

    cout << "Learning C++ Comments";

    return 0;
}

Why Use Comments?

To explain complex code.
To make programs easier to read.
To help other developers understand the program.
To temporarily disable code during testing.

Best Practices

Write clear and meaningful comments.
Do not write unnecessary comments.
Keep comments updated when the code changes.

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Next, learn about C++ Operators.