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Bessel Functions: _y0, _y1, _yn

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.

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.

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

Routine Required header Compatibility

_y0

<math.h>

Windows 95, Windows 98, Windows 98 Second Edition, Windows Millennium Edition, Windows NT 4.0, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003

_y1

<math.h>

Windows 95, Windows 98, Windows 98 Second Edition, Windows Millennium Edition, Windows NT 4.0, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003

_yn

<math.h>

Windows 95, Windows 98, Windows 98 Second Edition, Windows Millennium Edition, Windows NT 4.0, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003

For additional compatibility information, see Compatibility in the Introduction.

See Bessel Functions for an example.

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

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