本书主要通过App Inventor创建一个达宝宠物养成的应用程序，帮助青少年理解计算机科学的抽象内容。全书共7章，分别讲解了App Inventor基本知识、布局和画布、组件、条件判断和变量、列表、循环和过程、屏幕代码块的使用。
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