BESSEL_J0 (The GNU Fortran Compiler) (original) (raw)

8.40 BESSEL_J0 — Bessel function of the first kind of order 0 ¶

Synopsis:

RESULT = BESSEL_J0(X)

Description:

BESSEL_J0(X) computes the Bessel function of the first kind of order 0 of X. This function is available under the nameBESJ0 as a GNU extension.

Class:

Elemental function

Arguments:

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:

program test_besj0 real(8) :: x = 0.0_8 x = bessel_j0(x) end program test_besj0

Specific names:

Standard:

Fortran 2008 and later