7.26 BESSEL_JN — Bessel function of the first kind

Description:

BESSEL_JN(N, X) computes the Bessel function of the first kind of order N of X. This function is available under the name BESJN as a GNU extension.

If both arguments are arrays, their ranks and shapes shall conform.

Standard:

Fortran 2008 and later

Class:

Elemental function

Syntax:

RESULT = BESSEL_JN(N, X)

Arguments:

N	Shall be a scalar or an array of type INTEGER.
X	Shall be a scalar or an array of type REAL.

Return value:

The return value is a scalar of type REAL. It has the same kind as X.

Example:

          program test_besjn
            real(8) :: x = 1.0_8
            x = bessel_jn(5,x)
          end program test_besjn
     

Specific names:

Name	Argument	Return type	Standard
DBESJN(X)	INTEGER N	REAL(8)	GNU extension
	REAL(8) X