README
negaFibonacci
Compute the nth negaFibonacci number.
The negaFibonacci numbers are the integer sequence
The sequence is defined by the recurrence relation
which yields
with seed values F_0 = 0
and F_{-1} = 1
.
Installation
npm install @stdlib/math-base-special-negafibonacci
Usage
var negafibonacci = require( '@stdlib/math-base-special-negafibonacci' );
negafibonacci( n )
Computes the nth negaFibonacci number.
var v = negafibonacci( 0 );
// returns 0
v = negafibonacci( -1 );
// returns 1
v = negafibonacci( -2 );
// returns -1
v = negafibonacci( -3 );
// returns 2
v = negafibonacci( -78 );
// returns -8944394323791464
If n < -78
, the function returns NaN
, as larger negaFibonacci numbers cannot be safely represented in double-precision floating-point format.
var v = negafibonacci( -79 );
// returns NaN
If not provided a nonpositive integer value, the function returns NaN
.
var v = negafibonacci( -3.14 );
// returns NaN
v = negafibonacci( 1 );
// returns NaN
If provided NaN
, the function returns NaN
.
var v = negafibonacci( NaN );
// returns NaN
Examples
var negafibonacci = require( '@stdlib/math-base-special-negafibonacci' );
var v;
var i;
for ( i = 0; i > -79; i-- ) {
v = negafibonacci( i );
console.log( v );
}
Notice
This package is part of stdlib, a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.
For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.
Community
License
See LICENSE.
Copyright
Copyright © 2016-2021. The Stdlib Authors.