# BESSELJ

## Content

This function calculates the Bessel function of the first kind.

## Syntax

`BESSELJ(value, order)`

## Arguments

This function has these arguments:

| Argument | Description |
| -------- | ----------- |
| *value* | Value at which to evaluate the function |
| *order* | Number representing the order of the function; if it is not an integer, it is truncated |

## Remarks

If the value or order is non-numeric then a #Value! error is returned. If the order is less than 0 then the #NUM! error is returned.

## Examples

`BESSELJ(A4,D5)`
`BESSELJ(R4C1,R5C4)`
`BESSELJ(1.85,2)` gives the result 0.31812827879