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{{alias}}( n )
Computes the nth Fibonacci number.
Fibonacci numbers follow the recurrence relation
F_n = F_{n-1} + F_{n-2}
with seed values F_0 = 0 and F_1 = 1.
If `n` is greater than `78`, the function returns `NaN`, as larger Fibonacci
numbers cannot be accurately represented due to limitations of double-
precision floating-point format.
If not provided a nonnegative integer value, the function returns `NaN`.
If provided `NaN`, the function returns `NaN`.
Parameters
----------
n: integer
Input value.
Returns
-------
y: integer
Fibonacci number.
Examples
--------
> var y = {{alias}}( 0 )
0
> y = {{alias}}( 1 )
1
> y = {{alias}}( 2 )
1
> y = {{alias}}( 3 )
2
> y = {{alias}}( 4 )
3
> y = {{alias}}( 79 )
NaN
> y = {{alias}}( NaN )
NaN
See Also
--------
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