Processors, especially vector processors, are often optimized for array operations.Īrrays are useful mostly because the element indices can be computed at run time. In most modern computers and many external storage devices, the memory is a one-dimensional array of words, whose indices are their addresses.
They effectively exploit the addressing logic of computers. They are also used to implement many other data structures, such as lists and strings. Tables are often implemented in the form of arrays, especially lookup tables the word "table" is sometimes used as a synonym of array.Īrrays are among the oldest and most important data structures, and are used by almost every program. In some cases the term "vector" is used in computing to refer to an array, although tuples rather than vectors are the more mathematically correct equivalent. The memory address of the first element of an array is called first address, foundation address, or base address.īecause the mathematical concept of a matrix can be represented as a two-dimensional grid, two-dimensional arrays are also sometimes called "matrices". , 0x7F4) so that the element with index i has the address 2000 + ( i × 4). The simplest type of data structure is a linear array, also called one-dimensional array.įor example, an array of ten 32-bit (4-byte) integer variables, with indices 0 through 9, may be stored as ten words at memory addresses 2000, 2004, 2008. An array is stored such that the position of each element can be computed from its index tuple by a mathematical formula. In computer science, an array is a data structure consisting of a collection of elements ( values or variables), each identified by at least one array index or key. JSTOR ( September 2008) ( Learn how and when to remove this template message).Unsourced material may be challenged and removed.įind sources: "Array" data structure – news Please help improve this article by adding citations to reliable sources. This article needs additional citations for verification.
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