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 π times 252, these functions return an ERANGE error, denoting total loss of significance in the result.


These functions are deprecated.

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ARM C and C++ Libraries and Floating-Point Support User Guide:

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