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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. A module interface expresses the elements that are provided and required by the module. The elements defined in the interface are detectable by other modules. The implementation contains the working code that corresponds to the elements declared in the interface. Modular programming is closely related to structured programming and object-oriented programming, all having the same goal of facilitating construction of large software programs and systems by decomposition into smaller pieces, and all originating around the 1960s. While historically usage of these terms has been inconsistent, today "modular programming" refers to high-level decomposition of the code of an entire program into pieces, structured programming to the low-level code use of structured control flow, and object-oriented programming to the ''data'' use of objects, a kind of data structure. In object-oriented programming, the use of interfaces as an architectural pattern to construct modules is known as interface-based programming . ==Terminology== The term package is sometimes used instead of module (as in Dart, Go, or Java). In other implementations, this is a distinct concept; in Python a package is a collection of modules, while in the upcoming Java 9 it is planned to be introduced a new concept of module (a collection of packages with enhanced access control). Furthermore, the term "package" has other uses in software. A component is a similar concept, but typically refers to a higher level; a component is a piece of a whole system, while a module is a piece of an individual program. The scale of the term "module" varies significantly between languages; in Python it is very small-scale and each file is a module, while in Java 9 it is planned to be large-scale, where a module is a collection of packages, which are in turn collections of files. Other terms for modules include unit, used in Pascal dialects. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Modular programming」の詳細全文を読む スポンサード リンク
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