# BESSEL_J0

Elemental Intrinsic Function (Generic): Computes a Bessel function of the first kind, order 0.

result = BESSEL_J0 (x)

x | (Input) Must be of type real.

## Results

The result type and kind are the same as x.

The result has a value equal to a processor-dependent approximation to the Bessel function of the first kind and order zero of x.

## Example

BESSEL_J0 (1.0) has the approximate value 0.765.

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