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    DESIGNING USER INTERFACES                                                              CHAPTER

                      AND SIMULATING DATA                                                                   C2

                         Learning outcomes

                         The student will be able to:
                            understand the App Lab environment and design user interfaces using UI components.
                            create and customize sprites using image elements.
                            use variables to store and manipulate user input.
                            implement lists to store, add and display multiple data values.
                            apply background settings dynamically using code.
                            develop interactive applications by integrating UI elements, events and logic.

                                WHAT IS APP LAB?

                      App Lab is a visual programming environment on Code.org where you can design and
                      build apps using block-based or JavaScript coding. It allows users to create interactive
                      apps with buttons, text inputs, images and animations.

                      UI COMPONENTS

                      A User Interface (UI) is the part of an app that users interact with. A well-designed UI
                      makes an app easy to use, visually appealing and functional. In App Lab, you can create
                      buttons,  text  fields, labels and images  to  build  engaging  applications.  UI  components
                      are interactive elements that make an app functional and user-friendly. Here's a brief
                      explanation of some key components:

                         Buttons: Buttons are clickable elements that trigger specific actions when pressed. For
                         example, you might use a button to submit a form, navigate to a new page or start an
                         animation in an app.

                         Label: Labels are used to display text or information to users. They are non-interactive
                         and simply provide feedback or instructions. For example, a label could show the user’s
                         score, a message or the name of a button.
                         Text Area: A Text Area is a larger, multi-line input field that allows users to type longer
                         text. It’s used when you expect the user to enter more than just a single line of text, such
                         as a description, comment or message.

                      130   Premium Edition-V

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