# Basic Concepts

- [Comments in C](/c/basic-concepts/comments-in-c.md)
- [Preprocessor in C](/c/basic-concepts/preprocessor-in-c.md)
- [The #include Statement](/c/basic-concepts/the-include-statement.md)
- [Displaying Output](/c/basic-concepts/displaying-output.md)
- [Reading Input from the Terminal](/c/basic-concepts/reading-input-from-the-terminal.md)
- [Enums and Chars](/c/basic-concepts/enums-and-chars.md)
- [Data Types and Variables](/c/basic-concepts/data-types-and-variables.md)
- [Format Specifiers](/c/basic-concepts/format-specifiers.md)
- [Command Line Arguments](/c/basic-concepts/command-line-arguments.md)
- [Program: Calculating the Area of a Triangle](/c/basic-concepts/program-calculating-the-area-of-a-triangle.md)
