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This section describes some advanced or obscure features for GNU C function definitions. If you are just learning C, you can skip the rest of this chapter.
| • Variable-Length Array Parameters: | Functions that accept arrays of variable length. | |
| • Variable Number of Arguments: | Variadic functions. | |
| • Nested Functions: | Defining functions within functions. | |
| • Inline Function Definitions: | A function call optimization technique. |