What is the significance of the main() function in Python scripts?

• A. It defines global variables
• B. It acts as the entry point for execution
• C. It handles exceptions
• D. It imports modules

Answer: (B)

The main() function in Python scripts serves as the entry point for execution. When a Python script runs, it starts executing the code from the top down, but having a main() function allows for a structured approach. By placing the main logic of the program inside a main() function, developers can clearly indicate where the program starts its execution.

This organization provides several benefits. For example, it makes the code easier to read and maintain, as the main function can encapsulate the primary logic and improve clarity. Additionally, if the script is imported as a module in another script, the code in main() won’t execute automatically, which enhances reusability and modularity of the code.

Options that suggest defining global variables, handling exceptions, or importing modules do not capture the primary purpose of the main() function, which is focused on the execution flow of the program. While these activities can be part of a script that uses a main() function, they are not the defining significance of what the main() function is intended for.