From: sgk@REMOVEtroutmask.apl.washington.edu   
      
   On Sun, 20 Oct 2024 03:47:13 +0000, Lawrence D'Oliveiro wrote:   
      
   > I see that the Fortran 2023 spec has added a bunch of parallel trig   
   > functions that work in degrees.   
      
   No. Fortran does not contain "a bunch of parallel trig functions   
   that work in degrees."  It contains a bunch of elemental functions.   
      
   > I find this sort of thing unnecessary. It seems conventional to add   
   > functions for converting between degrees and radians, but a simpler way is   
   > to simply define a conversion factor for each angle unit. One conversion   
   > factor is simpler than two functions for each angle unit.   
      
   program foo   
      real x, y   
      x = 30+360*1111   
      y = x * (4 * atan(1.) / 180)   
      print *, sind(x), sin(y)   
   end program foo   
      
   % gfcx -o z a.f90 && ./z   
   0.500000000      0.500089288   
      
   One of these values is exact, and one of these raises FE_INEXACT.   
      
   --   
   steve   
      
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