AP Comp Sci Principles Unit 3

Iterative design process

user-focused, implementation/feedback cycles that should allow for experimentation and risk-taking; what specifications ("specs") are

Algorithm

is a series of commands

Interface purpose

to display info for users and collect info from them

How to trace code?

• semicolons end statements

• double-slash for comments (to better understand code)

• if you are making a string then you need to use quotes

User Interface

the inputs and outputs that allow a user to interact with a piece of software. User interface 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. (what goes in first) 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. (what comes out) 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

• no user interaction

• code runs the same way every time

Event Driven Programming

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

• programs run differently each time depending on user interactions

Debugging

the process of finding and fixing problems in code

• describe the problem

• hunt for bugs

• try solutions

• document as you go

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 rules

What is the driver and navigator in pair programming?

Driver - manipulates the keyboard and the mouse

Navigator - keeps track of the big picture + guides towards the goal

Pair Programming

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

Parameter

an extra piece of information passed to a function, typically with a shared purpose

Library

a collection of commands / functions, typically with a shared purpose