yn(), ynf()

Compute a Bessel function of the second kind of a given order

Synopsis:

#include <math.h>

double yn( int n, 
           double x );

float ynf( int n, 
           float x );

libm

Use the -l m option to qcc to link against this library.

These functions compute the Bessel function for x of the second kind of order n.

To check for error situations, use feclearexcept() and fetestexcept(). For example:

Call feclearexcept(FE_ALL_EXCEPT) before calling yn() or ynf().
On return, if fetestexcept(FE_ALL_EXCEPT) is nonzero, then an error has occurred.

The result of the Bessel function for x of the second kind of order n.

If the correct result would cause:	These functions return:	Errors:
Overflow	-Inf	FE_OVERFLOW
Underflow	0.0

These functions raise FE_INEXACT if the FPU reports that the result can't be exactly represented as a floating-point number.