# Definition of Arrays?

An array can be defined as a systematic arrangement of objects, usually in rows and columns. In computer science, it is a collection of data items that can be selected by indices computed at run-time. Another meaning is something that has been arranged in such a way that it is pleasant to the eye.
ar·ray
[uh-rey]
VERB (USED WITH OBJECT)
1.
to place in proper or desired order; marshal: Napoleon arrayed his troops for battle.
2.
to clothe with garments, especially of an ornamental kind; dress up; deck out: She arrayed herself in furs and diamonds.
NOUN
3.
order or arrangement, as of troops drawn up for battle.
4.
military force, especially a body of troops.
5.
a large and impressive grouping or organization of things: He couldn't dismiss the array of facts.
Source: Dictionary.com
An array is an orderly arrangement. In computer science, an array is a data structure that accesses its group of elements by indexing. In mathematics, it is the rectangular arrangement of quantities in rows and columns (matrix).
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