Editing Operand (section)

===Arity===
The number of operands of an operator is called its [[arity]].<ref name="Hazewinkel2001">{{cite book|author=Michiel Hazewinkel|author-link=Michiel Hazewinkel|title=Encyclopaedia of Mathematics, Supplement III|url=https://books.google.com/books?id=47YC2h295JUC&pg=PA3|year=2001|publisher=Springer|isbn=978-1-4020-0198-7|page=3}}: "Each connective has associated with it a natural number, called its ''rank'', or ''arity''."</ref> Based on arity, operators are chiefly classified as nullary (no operands), [[unary operation|unary]] (1 operand), [[binary operation|binary]] (2 operands), [[ternary operation|ternary]] (3 operands). Higher arities are less frequently denominated through a specific terms, all the more when function composition or [[currying]] can be used to avoid them. Other terms include:
{{div col}}
* quaternary, tetranary (4)
* quinary, quintenary, quinquennary (5)
* hexanary, senary, sexenary (6)
* septenary (7)
* octonary (8)
* nonary, novenary (9)
* denary (10)
* undenary (11)
* duodenary (12)
* tridecennary (13)
* quindenary (15)
* vigenary (20)
* quadringenary (40)
* quinquagenary (50)
* sexagenary (60)
* septuagenary (70)
* octogenary (80)
* nonagenary (90)
* centenary (100)
* sesquicentenary (150)
* bicentenary (200)
* tercentenary, tricentenary (300)
* quadringentenary, quatercentenary (400)
* quincentenary (500)
* sexcentenary (600)
* septcentenary (700)
* octocentenary (800)
{{div col end}}