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j0(), j1(), jn(), Bessel functions of the first kind

These functions compute Bessel functions of the first kind.

j0 and j1 compute the functions of order 0 and 1 respectively. jn computes the function of order n.

double j0(double x);
double j1(double x);
double jn(int n, double x);

If the absolute value of x exceeds pi times 2^52, these functions return an ERANGE error, denoting total loss of significance in the result.

Note

These functions are deprecated in ARM® Compiler 4.1 and later.