Function Type: Engineering
Description:
Returns the modified Bessel function In(x).
Function Structure:
=BESSELI(x, n)
Argument Breakdown:
x – The value at which the function is to be evaluated.
n – A positive integer, representing the order of the function. (If the supplied value of n is a decimal, this is truncated to an integer by Excel).
Example:

If n or x is non-numeric, BESSELI returns the #VALUE! error value and if n is less than 0, BESSELI returns the #NUM! error value.
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