In general, array is mutable and linear collection of same data type elements. The following is only an introduction to the concept 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
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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.
Each entry in the array represents an element ai,j of the matrix and is accessed by the two indices i and j Conventionally, i is the row index, numbered from top to bottom, and j is the column index, numbered from left to right. Function rank is an important concept to array programming languages in general, by analogy to tensor rank in mathematics Functions that operate on data may be classified by the number of dimensions they act on
It is frequently helpful in mathematics to refer to the elements of an array using subscripts The subscripts can be integers or variables Special (and more familiar) cases are vectors (1d arrays) and matrices (2d arrays)
