9.40. BESSEL_J0

9.40 BESSEL_J0 — Bessel function of the first kind of order 0

Description:

BESSEL_J0(X) computes the Bessel function of the first kind of order 0 of X. This function is available under the name BESJ0 as a GNU extension.

Standard:

Fortran 2008 and later

Class:

Elemental function

Syntax:

RESULT = BESSEL_J0(X)

Arguments:

X	The type shall be REAL.

Return value:

The return value is of type REAL and lies in the range - 0.4027... \leq Bessel (0,x) \leq 1. It has the same kind as X.

Example:

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