9.36. BESSEL_J0
9.36 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 nameBESJ0
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:
-
program test_besj0 real(8) :: x = 0.0_8 x = bessel_j0(x) end program test_besj0
- Specific n