An array is a reference data type that provides a way to store multiple values of the same type in one variable. Think of it as a row of boxes, where each box can hold one value. You can access the values in these boxes using their index, a number that tells you where the value is located in the array. Remember, an index starts at 0, so the first value is at index 0, the second at index 1, and so on.
Arrays are heavily tested in the AP exam, particularly in FRQ #3, so understanding them is essential.