Beginner module

Module 7: Arrays and ArrayList

Store groups of values with arrays and ArrayList, then learn the patterns you will use most when reading, updating, and searching through data.

Module lessons

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Use arrays to store a fixed-size group of values of the same type.

Use `for` and enhanced `for` loops to process every value in an array without repetitive code.

Practice the most useful beginner array tasks so grouped data becomes something you can analyze instead of only print.

Use `ArrayList` when you need a list that can grow and shrink as values are added or removed.

Choose between arrays and ArrayList based on whether the size is fixed, how often the data changes, and what operations you need.