BESELI function returns the I Bessel function of order
for the argument
is double-precision, the result is double precision, otherwise the argument is converted to floating-point and the result is floating-point.
Result = BESELI(
The expression for which the I Bessel function is required. The result will have the same dimensions as
The order of the I Bessel function to calculate.
must be an integer greater than or equal to 0.