In computer programming, an array is a data structure that stores a collection of items. The items can be of the same type (such as an array of integers) or they can be of different types (such as an array of mixed strings and numbers).

Arrays are often used to store and manipulate large amounts of data efficiently. They are also used to store collections of related data, such as the names of all the students in a class or the prices of all the products in a store.

In most programming languages, arrays are indexed, which means that each item in the array is associated with a numerical index that can be used to access the item. For example, if an array called "prices" stores the prices of different products, you could access the price of the first product with "prices[0]", the price of the second product with "prices[1]", and so on.

The size of an array is fixed when it is created and cannot be changed later. If you need to store more items than the array can hold, you will need to create a new array or use a different data structure.

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