# BESSEL_YN

Elemental and Transformational Intrinsic Functions (Generic): Compute Bessel functions of the second kind.

Elemental function: result = BESSEL_YN (n, x)

Transformational function: result = BESSEL_YN (n1, n2, x)

n, n1, n2 | (Input) Must be of type integer and nonnegative.
x | (Input) Must be of type real with a value greater than zero.

## Results

The result type and kind are the same as x.

The result of BESSEL_YN (n, x) is scalar. The result value of BESSEL_YN (n , x) is a processor-dependent approximation to the Bessel function of the second kind and order n of x.

The result of BESSEL_YN (n1, n2, x) is a rank-one array with extent MAX (n2 - n1 + 1, 0). Element i of the result value of BESSEL_YN (n1, n2, x) is a processor-dependent approximation to the Bessel function of the second kind and order n1 + i - 1 of x.

## Example

BESSEL_YN (2, 1.0) has the approximate value -1.651.

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