In the world of programming, naming conventions play a crucial role in writing clean, readable, and maintainable code. A well-chosen and consistent naming convention enhances the clarity and understandability of your code, making it easier for developers to collaborate and maintain the codebase. In this blog post, we will explore the best practices for naming files, classes, interfaces, functions, variables, constants, modules, and libraries in C++.


When naming files in C++, it is important to choose descriptive and meaningful names. Use lowercase letters, and separate words with underscores. For example, my_file.cpp or utility_functions.h. It is a good practice to use appropriate file extensions, such as .cpp for C++ source files, .h for header files, and .hpp for C++ header files.

Classes and Interfaces

When naming classes and interfaces, use PascalCase. Begin each word with an uppercase letter, including the first word. For example, MyClass or MyInterface. It is recommended to use nouns or noun phrases that accurately describe the purpose or role of the class or interface.


Function names should also use camelCase, starting with a lowercase letter. Begin each subsequent word with an uppercase letter. For example, calculateSum() or processData(). Choose descriptive and meaningful names that convey the purpose of the function.


Variable names should be descriptive and meaningful, using camelCase. Begin with a lowercase letter and use uppercase letters for subsequent words. For example, myVariable or numberOfElements. Avoid single-letter variable names unless they are used as loop counters or temporary variables within a very limited scope.


Constant names should be written in uppercase letters, with words separated by underscores. For example, MAX_VALUE or PI_VALUE. Use descriptive names that clearly indicate the purpose of the constant.

Modules and Libraries

When naming modules or libraries, use lowercase letters and separate words with underscores. For example, my_module or utility_library. Choose names that reflect the functionality or purpose of the module or library.

By following these naming conventions in C++, you can improve the readability, maintainability, and overall quality of your code. Consistent and meaningful names make it easier for yourself and other developers to understand and work with the codebase. Additionally, it is important to ensure that you follow any specific naming conventions or guidelines set by your project or organization.

I hope you found this tutorial helpful!