Comment Lines

Number of lines containing a comment.

A line only counts if it is active. This can overlap with other code counting metrics — for instance int j = 1; // comment has a comment, is a source line, is an executable source line, and is a declarative source line.

For example:

void SayHello::printHello() {
  switch (i) {
    case 0:
      cout << "Hello World" << endl;
    case 1:
      cout << "HELLO WORLD!" << endl;
    default: // a comment here
      for (int m = 0; m < j; m++);
      cout << "hello world" << endl;
  }
#ifdef A_VERY_NICE_VARIABLE

  cout << "Inactive Line" << endl; // Inactive
#endif

}

The default: // a comment here line (17) is the only active comment line. The // Inactive comment on the cout line inside the #ifdef block doesn't count because that line is inactive, giving CountLineComment = 1.

To also count comments inside inactive regions, use Comment Lines (Includes Inactive). For the per-language breakdown in web files, see Comment Lines (HTML), Comment Lines (JavaScript), and Comment Lines (PHP).

Also known as Comment Lines of Code (CLOC).

• Ada: Project, File, Type, Entry, Function, Package, Procedure, Protected, Task
• Basic: Project, File, Method, Module, Class
• C#: Project, File, Class, Method
• C++: Project, File, Class, Struct, Union, Function
• Fortran: Project, File, Module, Block Data, Function, Program, Subroutine
• Java: Project, File, Class, Interface, Method
• Jovial: Project, File, Module, Subroutine
• Pascal: Project, File, Class, Interface, Compunit, Function, Procedure
• Python: Project, File, Class, Function
• Rust: Project, File, Function
• VHDL: Project, File, Procedure, Function, Process, Architecture
• Web: Project, File, PHP Class, PHP Interface

• This metric can be disabled from "Project Configuration/Metrics/Lines and Statements" with the "Show line count metrics" option.
• This metric can be disabled from "Project Configuration/Metrics/Lines and Statements" with the "Include inactive lines" option for languages that have inactive lines.
• For projects and architectures, this metric is enabled from "Project Configuration/Metrics/Projects and Architectures" with the "Show default summary metrics" option.