Bessel Functions: _y0, _y1, _yn

Article
2013-02-01

Compute the Bessel function.

double _y0( 
   double x 
);
double _y1( 
   double x 
);
double _yn( 
   int n,
   double x 
);

Parameters

x
Floating-point value.
n
Integer order of Bessel function.

Return Value

Each routine returns a Bessel function of x. If x is negative, the routine sets errno to EDOM, prints a _DOMAIN error message to stderr, and returns _HUGE_VAL. You can modify error handling by using _matherr.

Remarks

The _y0, _y1, and _yn routines return Bessel functions of the second kind: orders 0, 1, and n, respectively.

Input	SEH Exception	Matherr Exception
± QNAN,IND	INVALID	_DOMAIN
± 0	ZERODIVIDE	_SING
\|x\|<0.0	INVALID	_DOMAIN

Requirements

Routine	Required header
_y0	<math.h>
_y1	<math.h>
_yn	<math.h>

For additional compatibility information, see Compatibility in the Introduction.

Example

See Bessel Functions for an example.

.NET Framework Equivalent

Not applicable. To call the standard C function, use PInvoke. For more information, see Platform Invoke Examples.

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