Page 103 - KEC Khaitan C5 Flipbook
P. 103
USER INTERFACE (UI) CHAPTER
PROGRAMMING AND LOGIC B4
learning outcomes
The student will be able to:
understand User Interface (UI) and its key design principles.
design a Multiplication Table App using MIT App Inventor.
implement logic to generate and display multiplication tables.
test the app for accuracy and proper functionality.
debug common issues to improve app performance.
Have you ever wondered how a mobile app works? When you press a button in a game or
type something in a calculator app, you are using the User Interface (UI)! In this chapter,
we will learn how to design and program a simple app in MIT App Inventor using UI
components and logic.
WHAT IS A USER INTERFACE (UI)?
The User Interface (UI) is everything you see and touch on a screen when using an app. It
includes buttons, text, pictures, and boxes where you can type. The UI helps people use the
app easily by making it simple to click, read, and enter information.
KEY PRINCIPLES OF UI (USER INTERFACE) DESIGN
A good User Interface (UI) helps people use an app easily. It makes sure everything on
the screen is clear, simple, and easy to understand. Here are some important rules that
make an app fun and easy to use:
1. CLARITY
Clarity means everything on the screen should be easy to see and understand. Buttons,
text, and pictures should clearly show what they do so people don’t get confused.
User Interface (UI) Programming and Logic 101

