Function permutations #
Compute the number of ways of obtaining an ordered subset of k
elements
from a set of n
elements.
Permutations only takes integer arguments. The following condition must be enforced: k <= n.
Syntax #
math.permutations(n)
math.permutations(n, k)
Parameters #
Parameter | Type | Description |
---|---|---|
n |
number | BigNumber | The number of objects in total |
k |
number | BigNumber | The number of objects in the subset |
Returns #
Type | Description |
---|---|
number | BigNumber | The number of permutations |
Throws #
Type | Description —- | ———–
Examples #
math.permutations(5) // 120
math.permutations(5, 3) // 60