App design

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

• User Interface

• Input

• Out

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.

• User Interface

• Input

• 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.

• Output

• Input

• User Interface

What elements collect input?

• Buttons

• Text input

• Check boxes and radio buttons

• Dropdown

What elements display output

• Images

• Text

Most elements can do both because they can all be clicked and can change their content.

• True

• False

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

• Program

• Program Statement

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

• Program

• Program Statement

Program statements run in order, from top to bottom.

No user interaction

Code runs the same way every time.

• Sequential Progamming

• Event Driven Programming

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

Programs run differently each time depending on user interactions.

• Sequential Programming

• Event Driven Programming