Syntax

 cnp(N,P)

* 'N' and 'P' are integer expressions. 'P' must be in the [0,N] range.

Examples

 Local Integer I,J, NB_ARRI=10J=8NB_PERM=cnp(I,J) : # Returns 45

cnp(N,P) returns fac(N)/ (fac(P)*fac(N-P)).

To avoid loosing precision, the calculation algorithm does not use the factorial function. If 'N' and 'P' are not integer values, they are truncated.

The type of result is Integer or Decimal depending if the value is smaller or greater than 2^31-1.