ELI5: Explain Like I'm 5

Modular programming

Modular programming is like a puzzle. It's a way for people to break up large programs into smaller parts, or modules, that are easier to handle. Each piece, or module, contains instructions for how to do one part of the program. After you put all the pieces together, you have all the instructions for the program. This makes it easier for people to understand how the program works and make changes to it.