Final answer:
The program design that involves breaking an algorithm into two functions is called modular programming.
Step-by-step explanation:
Modular programming is a design methodology that enhances code organization and readability by breaking down a complex algorithm into smaller, self-contained functions or modules. This approach promotes code reusability and facilitates maintenance, as each function addresses a specific task or subproblem. By encapsulating discrete functionalities within these modules, developers can focus on individual components, making it easier to comprehend, test, and update the codebase. The modular structure allows for greater flexibility, scalability, and collaboration among team members. Overall, modular programming fosters a systematic and efficient way to manage intricate algorithms, fostering better software design and development practices.