Unix	Unix v7
	j0(3m)

J0

NAME

j0, j1, jn, y0, y1, yn − bessel functions

#include <math.h>

double j0(x)
double x;

double j1(x)
double x;

double jn(n, x);
double x;

double y0(x)
double x;

double y1(x)
double x;

double yn(n, x)
double x;

These functions calculate Bessel functions of the first and second kinds for real arguments and integer orders.

Negative arguments cause y0, y1, and yn to return a huge negative value and set errno to EDOM.

j0(3m)