tfm.optimization.math.perm

Number of ways to choose k items from n items without repetition and with order.

tfm.optimization.math.perm(
    n, k, /
)

Evaluates to n! / (n - k)! when k <= n and evaluates to zero when k > n.

If k is not specified or is None, then k defaults to n and the function returns n!.

Raises TypeError if either of the arguments are not integers. Raises ValueError if either of the arguments are negative.