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<h2>Fortran mode</h2>


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! Example Fortran code
  program average

  ! Read in some numbers and take the average
  ! As written, if there are no data points, an average of zero is returned
  ! While this may not be desired behavior, it keeps this example simple

  implicit none

  real, dimension(:), allocatable :: points
  integer                         :: number_of_points
  real                            :: average_points=0., positive_average=0., negative_average=0.

  write (*,*) "Input number of points to average:"
  read  (*,*) number_of_points

  allocate (points(number_of_points))

  write (*,*) "Enter the points to average:"
  read  (*,*) points

  ! Take the average by summing points and dividing by number_of_points
  if (number_of_points > 0) average_points = sum(points) / number_of_points

  ! Now form average over positive and negative points only
  if (count(points > 0.) > 0) then
     positive_average = sum(points, points > 0.) / count(points > 0.)
  end if

  if (count(points < 0.) > 0) then
     negative_average = sum(points, points < 0.) / count(points < 0.)