Fortran Wiki
bessel_j1

Description

bessel_j1(x) computes the Bessel function of the first kind of order 1 of x.

Standard

Fortran 2008 and later

Class

Elemental function

Syntax

result = bessel_j1(x)

Arguments

  • x - The type shall be real, and it shall be scalar.

Return value

The return value is of type real and it lies in the range 0.5818...Bessel(0,x)0.5818. It has the same kind as x.

Example

program test_besj1
  real(8) :: x = 1.0_8
  x = bessel_j1(x)
end program test_besj1

category: intrinsics