Presentation logic

In software development, presentation logic is concerned with how business objects are displayed to users of the software, e.g. the choice between a pop-up screen and a drop-down menu. The separation of business logic from presentation logic is an important concern for software development and an instance of the separation of presentation and content.
One major rationale behind "effective separation" is the need for maximum flexibility in the code and resources dedicated to the presentation logic. Client demands, changing customer preferences and desire to present a "fresh face" for pre-existing content often result in the need to dramatically modify the public appearance of content while disrupting the underlying infrastructure as little as possible.
The distinction between "presentation" (front end) and "business logic" is usually an important one, because: