## Friday, January 14, 2022

### BESSELJ function [MS]

This article describes the formula syntax and usage of the BESSELJ function in Microsoft Excel.

## Description

Returns the Bessel function.

## Syntax

BESSELJ(X, N)

The BESSELJ 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.

## Remarks

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

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

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

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

where:

is the Gamma function.

## Example

Copy the example data in the following table, and paste it in cell A1 of a new Excel worksheet. For formulas to show results, select them, press F2, and then press Enter. If you need to, you can adjust the column widths to see all the data.

 Formula Description Result =BESSELJ(1.9, 2) Bessel function at 1.9 with an order of 2. 0.329925829