FNJnreturns the value of the cylindrical Bessel function of the first kind and ordernofx,Jn(x).Jn(x) is defined for all values ofnandx.
Errors
FNJncauses an HTBasic error if its arguments are not of the types listed in the USAGE section, above.
Note
The algorithm used computes the value ofJnusing a recursion from the values ofJ0 andJ1. The computation time increases withnand the computation accuracy decreases withn.