Ap Computer Science Principles: Unit 3, App Design

User Interface

the inputs and outputs that allow a user to interact with a piece of software. Can include a variety of forms such as buttons, menus, images, text, and graphics

Input

data that are sent to a computer for processing by a program. Can come in a variety of forms, such as tactile interaction, audio, visuals, or text.

Output

any data that are sent from a program to a device. Can come in a variety of forms, such as tactile interaction, audio, visuals, or text.

Program Statement

a command or instruction. Sometimes also referred to as a code statement.

Program

a collection of program statements. Programs run (or 'execute') one command at a time.

Sequential Programming

program statements run in order, from top to bottom.

Event Driven Programming

some program statements run when triggered by an event, like a mouse click or a key press.

Documentation

a written description of how a command or piece of code works or was developed.

Comment

form of program documentation written into the program to be read by people and which do not affect how a program runs.

Pair Programming

a collaborative programming style in which two programmers switch between the roles of writing code and tracking or planning high level progress.

Debugging

Finding and fixing problems in an algorithm or program.

Development process

the steps or phases used to create a piece of software. Typical phases include investigating, designing, prototyping, and testing.

Event

associated with an action and supplies input data to a program. Can be generated when a key is pressed, a mouse is clicked, a program is started, or by any other defined action that affects the flow of execution.