Jump to content

Unary function

From Wikipedia, the free encyclopedia
This is an old revision of this page, as edited by Cemeterysummoning (talk | contribs) at 02:24, 5 November 2022 (Changes in grammar and clarity). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

A unary function is a function that takes one argument. A unary operator belongs to a subset of unary functions, in that its range coincides with its domain. In contrast, a unary function's domain may or may not coincide with its range.

Examples

The successor function, denoted , is a unary operator. Its domain and codomain are the natural numbers, its definition is as follows:

In many programming languages such as C, executing this operation is denoted by postfixing to the operand, i.e. the use of is equivalent to executing the assignment .

Many of the elementary functions are unary functions, including the trigonometric functions, logarithm with a specified base, exponentiation to a particular power or base, and hyperbolic functions.

See also

References