# arity

The arity of something is the number of arguments it takes. This is usually applied to functions: an $n$-ary function is one that takes $n$ arguments. Unary is a synonym for $1$-ary, and binary for $2$-ary.

Title arity Arity 2013-03-22 13:00:01 2013-03-22 13:00:01 Henry (455) Henry (455) 4 Henry (455) Definition msc 00A05 ary -arity BinaryOperation unary binary