External module "math/base/special/falling-factorial/docs/types/index.d"

Export assignment fallingFactorial

• fallingFactorial(x: number, n: number): number

• Computes the falling factorial of x and n.

  Notes

  • If not provided a nonnegative integer for n, the function returns NaN.
  • If provided NaN as any argument, the function returns NaN.

  Parameters

  • x: number

    first function parameter

  • n: number

    second function parameter

  Returns number

  function value

  Example

  var v = fallingFactorial( 0.9, 5 );
  // returns ~0.644

  Example

  var v = fallingFactorial( -9.0, 3 );
  // returns -990.0

  Example

  var v = fallingFactorial( 0.0, 2 );
  // returns 0.0

  Example

  var v = fallingFactorial( 3.0, -2 );
  // returns NaN