j0(), j0f(), j1(), j1f(), jn(), jnf() bessel functions of the first kind	Function
	SYNOPSIS DESCRIPTION PARAMETERS RETURN VALUES CONFORMANCE MULTITHREAD SAFETY LEVEL PORTING ISSUES AVAILABILITY SEE ALSO

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SYNOPSIS

#include <math.h>

double j0(double x)

float j0f(float x)

double j1(double x)

float j1f(float x)

double jn(int n, double x)

float jnf(int n, float x)

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DESCRIPTION

The functions j0(), j0f(), j1(), and j1f() compute the Bessel function of the first kind of the order 0 and the order 1, respectively, for the real value x; the functions jn() and jnf() compute the Bessel function of the first kind of the integer order n for the real value x.

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PARAMETERS

x 

Is the number whose Bessel function is to be derived.

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RETURN VALUES

If successful, these functions return the Bessel value of x.

If x is NaN, NaN is returned.

If the absolute value of x is greater than X TLOSS then:

• In IEEE mode, the correct answer is returned.

• In POSIX mode, 0.0 is returned and errno is set to ERANGE.

• In SVID or XOPEN mode, 0.0 is returned and the matherr() function is called.

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CONFORMANCE

UNIX 98.

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MULTITHREAD SAFETY LEVEL

MT-Safe.

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PORTING ISSUES

None.

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AVAILABILITY

MKS Toolkit for Professional Developers
MKS Toolkit for Enterprise Developers
MKS Toolkit for Enterprise Developers 64-Bit Edition

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SEE ALSO

Functions:

math(), matherr(), y0()

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MKS Toolkit 9.2 Documentation Build 16.