Rank (computer programming): Difference between revisions

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In [[computer programming]], the '''rank of an array''' is usually defined to be the number of [[dimension]]s of that array. For example, a [[matrix (mathematics)|matrix]] is an array of rank 2. In some languages, such as [[APL programming language|APL]], a [[scalar]] is defined as an array of rank 0.

In [[Fortran]], the number of dimensions in an [[array]].

In APL, the unary ''ρ'' ([[rho (letter)|rho]]) operator can be used to find the dimensions of an array; thus, ''ρρA'' is the rank of ''A''.

For example, a [[matrix (mathematics)|matrix]] is an array of rank 2.

==See also==

*[[Rank (linear algebra)]], for a different definition of "rank" as applied to [[matrix (mathematics)|matrices]]

A [[scalar]] is sometimes defined as an array of rank 0.

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[[Category:Data types]]