What is role of Array in Data Structure?

What is role of Array in Data Structure? Explain with Examples?

Array is the most widely used data structure. It is also used as constituting integral part of other data structures.
Array is mainly used to store similar data. For storing elements of indexed data, the particular method is array. For example, if you were storing information about each day in August, you would create an array with an index capable of addressing 31 values -- one for each day of the month. Think of a notebook with pages numbered 1 through 12. Each page may or may not contain information on it. The notebook is an array of pages. Each page is an element of the array 'notebook'.
Arrays can also be multidimensional - instead of accessing an element of a one-dimensional list, elements are accessed by two or more indices, as from a matrix or tensor.
Arrays guarantee constant time read and write access,O(1) , however many look up operations (find_min, find_max, find_index) of an instance of an element are linear time, O(n). Arrays are very efficient in most languages, as operations compute the address of an element via a simple formula based on the base address element of the array.