Program Functionality and Purpose

Part of: Creative Development

What a Program Does Every program exists to serve a purpose : the problem it solves or the value it provides to users. Program functionality is the set of behaviors that fulfill that purpose: the inputs it accepts, the processing it performs, and the outputs it returns. Describing functionality clearly is part of both design and documentation. Inputs, Processing, Outputs Most programs follow an input → process → output structure: - Input : data the program receives (from a user, file, or sensor). - Process : the logic that transforms input into a result. - Output : what the program produces for the user. A program's functionality is judged by whether its outputs correctly fulfill its purpose for the expected inputs. Bringing the Process Together This final lesson combines everything: investigate the need, design the structure, prototype, test, handle errors, and document. Suppose the purpose is a simple grade reporter: read several scores and report the average and whether the class passed (average of at least 60). The input is the scores, the process computes the average, and the output is two lines fulfilling the purpose. Each piece reflects a phase you learned earlier. Judging F

Challenge: Grade Reporter