External module "math/base/special/negafibonacci/docs/types/index.d"

Export assignment negafibonacci

• negafibonacci(n: number): number

• Computes the nth negaFibonacci number.

  Notes

  • The negaFibonacci numbers follow the recurrence relation F_{n-2} = F_{n} - F_{n-1} with seed values F_0 = 0 and F_{-1} = 1.
  • If |n| is greater than 78, the function returns NaN as larger negaFibonacci numbers cannot be accurately represented due to limitations of double-precision floating-point format.
  • If not provided a non-positive integer value, the function returns NaN.

  Parameters

  • n: number

  Returns number

  negaFibonacci number

  Example

  var y = negafibonacci( 0 );
  // returns 0

  Example

  var y = negafibonacci( -1 );
  // returns 1

  Example

  var y = negafibonacci( -2 );
  // returns -1

  Example

  var y = negafibonacci( -3 );
  // returns 2

  Example

  var y = negafibonacci( -4 );
  // returns -3

  Example

  var y = negafibonacci( -5 );
  // returns 5

  Example

  var y = negafibonacci( -6 );
  // returns -8

  Example

  var y = negafibonacci( NaN );
  // returns NaN

  Example

  var y = negafibonacci( -3.14 );
  // returns NaN