C++ Comments

Comments play an important role in making code more readable and understandable. They allow programmers to document their logic, leave notes, or temporarily disable parts of the code without affecting execution. In C++, comments can be single-line or multi-line.

Single-Line Comments

Single-line comments begin with two forward slashes (//). The compiler ignores everything after // on that line.

Example:

// This line describes the upcoming output
cout << "Revving up the engine!";

// This line describes the upcoming output

cout << "Revving up the engine!";

​

Comments can also be placed at the end of a statement:

cout << "Revving up the engine!"; // Displaying a message

cout << "Revving up the engine!"; // Displaying a message

​

Multi-Line Comments

For longer explanations, multi-line comments start with /* and end with */. The compiler ignores everything between these markers.

Example:

/* The code below prints a message
about the thrill of motorcycles */
cout << "Revving up the engine!";

/* The code below prints a message

about the thrill of motorcycles */

cout << "Revving up the engine!";

​

Why Use Comments?

• Improves readability by explaining sections of code.
• Helps debugging by allowing temporary removal of code without deletion.
• Documents code for future reference or collaboration.