Function Permutation(n, m)

Permutation

The function Permutation computes the number of permutations of length \(m\) in \(n\) items.

Permutation(
           n,            ! (input) integer expression
           m             ! (input) integer expression
           )

Arguments

n

An integer numerical expression \(\geq 0\).

m

An integer numerical expression in the range \(0,\dots,n\).

Return Value

The function Permutation returns \(m!\cdot{\binom{n}{m}}\), the number of permutations of length m in a given number of items n.

See also

Combinatoric functions are discussed in full detail in Combinatoric functions.