What is BESSELI function in Excel?
The BESSELI function is one of the Engineering functions of Excel.
It Returns the modified Bessel function In(x).
We can find this function in Engineering category of insert function Tab.
How to use BESSELI function in excel
- Click on an empty cell (like F5 ).

2. Click on the fx icon (or press shift+F3).

3. In the insert function tab you will see all functions.

4. Select Engineering category.
5. Select BESSELI function.
6. Then select ok.

7. In the function arguments Tab you will see BESSELI function.
8. X section is the value at which to evaluate the function.
9. N section is the order of the Bessel function.
10. You will see the results in the formula result section.

Examples of BESSELI function in Excel
Example 1:
How to use BESSELI function in excel
You can see examples of BESSELI function below:

besseli(A2,B2) ----->>>>answer is 0.0008
besseli(A3,B3) ----->>>>answer is 1.661
besseli(A4,B4) ----->>>>answer is -9.759
besseli(A5,B5) ----->>>>answer is 71.033
Purpose of BESSELI function
It Returns the modified Bessel function In(x).
Return value of BESSELI function
It returns a number.
Arguments of BESSELI function
This function has just 2 Argument.
The argument of BESSELI function is number.
X section is the value at which to evaluate the function.
N section is the order of the Bessel function.
The argument of BESSELI function is required and not optional.
BESSELI(number) = number
Version of excel supports BESSELI function
This function is available for all excel versions (2003-2019)