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C Library Functions  - bessel_j1 (3)

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NAME

BESSEL_J1(3) - [MATHEMATICS] Bessel function of the first kind of order 1

SYNOPSIS

result = bessel_j1(x)

         elemental real(kind=KIND) function bessel_j1(x)

          real(kind=KIND),intent(in) :: x

CHARACTERISTICS

o	KIND may be any supported real KIND.
o	the result is of the same type and kind as X

DESCRIPTION

BESSEL_J1(3) computes the Bessel function of the first kind of order 1 of X.

OPTIONS

o	X : The type shall be real.

RESULT

The return value is of type real and lies in the range -0.5818 <= BESSEL(0,X) <= 0.5818 . It has the same kind as X.

EXAMPLES

Sample program:

    program demo_bessel_j1
    use, intrinsic :: iso_fortran_env, only : real_kinds, &
     & real32, real64, real128
    implicit none
    real(kind=real64) :: x = 1.0_real64
       x = bessel_j1(x)
       write(*,*)x
    end program demo_bessel_j1

Results:

         0.44005058574493350

STANDARD

Fortran 2008

SEE ALSO

BESSEL_J0(3), BESSEL_JN(3), BESSEL_Y0(3), BESSEL_Y1(3), BESSEL_YN(3)

fortran-lang intrinsic descriptions

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Nemo Release 3.1

bessel_j1 (3)

July 22, 2023

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