In computer science, array is a data type that represents a collection of elements (values or variables), each selected by one or more indices (identifying keys) that can be computed at run time during program execution Such a collection is usually called an array variable or array value [1] by analogy with the mathematical concepts vector and matrix, array types with one and two indices are. In javascript, an object is an associative array, augmented with a prototype (see below) Each key provides the name for an object property, and there are two syntactical ways to specify such a name Dot notation (obj.x = 10) and bracket notation (obj[x] = 10).
Array (data structure) in computer science, an array is a data structure consisting of a collection of elements (values or variables), of same memory size, each identified by at least one array index or key, a collection of which may be a tuple, known as an index tuple In general, array is mutable and linear collection of same data type elements. Previously, javascript only supported function scoping using the keyword var, but ecmascript 2015 added the keywords let and const, allowing javascript to support both block scoping and function scoping. The logical size and capacity of the final array are shown
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