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BESSEL_J1 — Bessel function of the first kind of order 1BESSEL_J1(X) computes the Bessel function of the first kind of
order 1 of X. This function is available under the name
BESJ1 as a GNU extension.
Fortran 2008
Elemental function
RESULT = BESSEL_J1(X)
| X | The type shall be REAL. |
The return value is of type REAL and lies in the
range - 0.5818... \leq Bessel (0,x) \leq 0.5818 . It has the same
kind as X.
program test_besj1 real(8) :: x = 1.0_8 x = bessel_j1(x) end program test_besj1
| Name | Argument | Return type | Standard |
|---|---|---|---|
DBESJ1(X) | REAL(8) X | REAL(8) | GNU extension |