In computer science, an array is a fundamental data structure used to store a collection of elements of the same type. Arrays are beneficial because they allow for efficient access to individual elements based on an index. One important concept related to arrays is the concept of array indexing. In most programming languages, array indexing starts at 0. This means that the first element in an array is accessed using index 0, the second element using index 1, and so on. Another important aspect of arrays is their fixed size. Once an array is declared with a specific size, that size cannot be changed during runtime. If more space is needed, a new array must be allocated and the elements from the old array must be copied over. One common operation performed on arrays is iterating through each element. This can be done using a loop, such as a for loop in many programming languages. By iterating through an array, various operations can be performed on each element, such as updating values or calculating a sum. Overall, arrays play a crucial role in computer science and are utilized in a wide range of applications, from processing large datasets to implementing algorithms and data structures. Mastering the concept of arrays is essential for any aspiring programmer.