An ordered list of values stored in a single variable.
An array is an ordered collection of values stored under a single Variable name. Arrays let you work with lists of data: a list of users, a list of products, a list of scores. Each item has an index (position number, starting at 0).
JavaScript arrays come with powerful built-in methods like map (transform each item), filter (keep items matching a condition), and forEach (do something with each item). Arrays work closely with objects — most API responses return arrays of objects as JSON. You can use Destructuring to extract values from arrays, pass arrays as props, and process them in useEffect hooks.
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