What is the purpose of the main() function in C?
a) It is the entry point of the program
b) It allocates memory
c) It defines global variables
d) It handles file I/O
Answer:
a) It is the entry point of the program
Explanation:
The main() function in C is the entry point of the program. When a C program is executed, the operating system starts the execution by calling the main() function. This function may take arguments (e.g., argc and argv) and return an integer value to the operating system, typically indicating success or failure. The code inside main() defines the overall flow of the program.
Understanding the role of main() is fundamental to C programming, as every C program must have exactly one main() function, which serves as the starting point for the program’s execution.