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bessel_jn (changes)

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Description

bessel_jn(n, x) computes the Bessel function of the first kind of order n of x . Ifn and x are arrays, their ranks and shapes shall conform.

bessel_jn(n1, n2, x) returns an array with the Bessel functions of the first kind of the orders n1 to n2.

Standard

Fortran 2008 and later

Class

Elemental function , except for the transformational variant. variantbessel_jn(n1, n2, x).

Syntax

result = bessel_jn(n, x)
result = bessel_jn(n1, n2, x)result = bessel_jn(n, x)
result = bessel_jn(n1, n2, x)

Arguments

• n - Shall be a scalar or an array of type integer.
• n1 - Shall be a non-negative scalar of type integer.
• n2 - Shall be a non-negative scalar of type integer.
• x - Shall be a scalar or an array of type real . Forbessel_jn(n1, n2, x) it shall be scalar.

Return value

The return value is a scalar of type real. It has the same kind as x.

Example

program test_besjn
  real(8) :: x = 1.0_8
  x = bessel_jn(5,x)
end program test_besjn