Q.Mention different sections appear in C programming.

A C program is organised into a fixed set of sections that appear in a definite order, from documentation at the top to user-defined functions at the bottom.

[!ANSWER]

The main sections are: (1) Documentation section, (2) Link / preprocessor section (#include), (3) Definition section (#define), (4) Global declaration section, (5) main() function section, and (6) Subprogram (user-defined function) section.

[!TLDR]

Every C program follows a standard layout of six sections, most of which are optional except main().

A source program is written in a logical order so that the compiler can process it correctly. The commonly used sections are:

1. Documentation section - comments giving the program name, author and purpose; ignored by the compiler.
2. Link / preprocessor section - #include directives that link header files (such as stdio.h) to the program.
3. Definition section - #define directives that define symbolic constants and macros.
4. Global declaration section - declaration of variables/functions used by more than one function.
5. main() function section - the compulsory part; it has a declaration part (local variables) and an executable part (statements) enclosed in braces { }.
6. Subprogram section - user-defined functions, written before or after main().

Only the main() function is compulsory; the remaining sections are included as required.

[!ANSWER]

Documentation, Link/preprocessor, Definition, Global declaration, main() function, and Subprogram sections - with only main() being compulsory.