Documentation: Comments explaining the program.

Link: External libraries or modules.

Definition: Constants, macros, global entities.

Global Declaration: Declarations outside functions.

Main() Function: Entry point of the program.

Subprograms: Functions or procedures.

C program is divided into six sections: Documentation, Link, Definition, Global Declaration, Main() Function, and Subprograms.

C programming is a powerful and widely-used programming language known for its efficiency and versatility. It provides a wide range of features that make it suitable for various applications. Here are some of the main features of C programming:

1. Simplicity: C has a simple and concise syntax, making it easy to learn and understand. It follows a structured approach and provides a clear set of rules for programming.
2. Portability: C programs can be written to be portable across different platforms and operating systems. This is because C is a low-level language that allows direct manipulation of hardware resources and memory.
3. Efficiency: C is known for its efficiency in terms of execution speed and memory usage. It provides low-level access to memory and hardware, allowing programmers to write code that runs quickly and utilizes system resources efficiently.
4. Modularity: C supports the concept of modular programming through functions and libraries. Code can be organized into separate modules, making it easier to manage and reuse. Functions can be defined once and called multiple times from different parts of the program.
5. Pointers: Pointers are a fundamental feature of C programming. They allow direct manipulation of memory addresses, enabling efficient memory management and the ability to work with complex data structures.
6. Control Structures: C provides a variety of control structures, including conditional statements (if-else, switch-case), loops (for, while, do-while), and jump statements (break, continue, goto). These control structures enable programmers to control the flow of execution within a program.
7. Extensibility: C supports the use of external libraries, allowing programmers to extend the functionality of their programs by incorporating pre-written code. The Standard Library provides a wide range of functions for common tasks, and there are many third-party libraries available for specific purposes.
8. Recursion: C allows recursion, which is the ability for a function to call itself. This feature is useful for solving problems that can be naturally divided into smaller, similar sub-problems.
9. Low-level Programming: C provides direct access to memory and hardware resources, making it suitable for low-level programming tasks such as system programming, embedded systems, and device drivers.
10. Wide Usage: C is widely used in various domains, including operating systems, embedded systems, game development, scientific programming, and more. Its popularity and extensive usage have led to a vast amount of documentation, libraries, and community support.

These features contribute to C’s popularity and enduring relevance in the programming world, even though newer languages and technologies have emerged over the years.