0-ary function


Definition: A function that takes no arguments.

Also known as nullary function.

See also constant function, unary function, binary function, n-ary function.

Note: Pronounced "zero-airy". By analogy to unary, binary, etc.

A 0-ary or nullary function that is pure (no state or interactions with external variables) must be a constant function.

Author: PEB

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Entry modified 17 December 2004.
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Cite this as:
Paul E. Black, "0-ary function", in Dictionary of Algorithms and Data Structures [online], Paul E. Black, ed. 17 December 2004. (accessed TODAY) Available from: