This chapter contains an overview of C programming basics for UDFs.

• A.1. Introduction
• A.2. Commenting Your C Code
• A.3. C Data Types in Ansys Fluent
• A.4. Constants
• A.5. Variables
• A.6. User-Defined Data Types
• A.7. Casting
• A.8. Functions
• A.9. Arrays
• A.10. Pointers
• A.11. Control Statements
• A.12. Common C Operators
• A.13. C Library Functions
• A.14. Preprocessor Directives
• A.15. Comparison with FORTRAN