Returns the modified Bessel function, which is equivalent to the Bessel function evaluated for purely imaginary arguments. 

Sample Usage 



The BESSELI function syntax has the following arguments:

  • X    Required. The value at which to evaluate the function.

  • N    Required. The order of the Bessel function. If n is not an integer, it is truncated.


  • If x is nonnumeric, BESSELI returns the #VALUE! error value.

  • If n is nonnumeric, BESSELI returns the #VALUE! error value.

  • If n < 0, BESSELI returns the #NUM! error value.

  • The n-th order modified Bessel function of the variable x is:


In order to use the BESSELI formula, start with your edited Excellentable:

Then type in the BESSELI formula in the area you would like to display the outcome:

By adding the values you would like to calculate the BESSELI formula for, Excellentable will generate the outcome:


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