In this task, we ask you to rewrite a sentence in simple English without changing its general meaning. Essentially, you want to make the sentence easier to read by using simpler words, utilizing more straightforward sentence structures, and omitting non-essential information etc.

Modular programming is a software design technique that emphasizes separating the functionality of a program into independent , interchangeable modules , such that each contains everything necessary to execute only one aspect of the desired functionality .
Modular programming is a way of organizing a computer program into smaller parts called modules .