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Printing certain values from a Fortran DO loop

johnwalton84 (TechnicalUser)
7 Dec 04 9:14
I've written a program in Fortran which has a do loop of the form

do i=0,20000

(operations)

end do

I want the program to print the values of the do loop, but only want it to print every 100th value of i (i.e. i=100,200,300,400...20000), can anyone suggest a way to do this?
xwb (Programmer)
7 Dec 04 12:16

CODE

do i = 0, 20000, 100
...
end do
johnwalton84 (TechnicalUser)
7 Dec 04 12:44
Yeah, that would be fine expect the program needs to write all of the intermediate values do the screen. I've found the answer though, adding

   if (mod(i,100) .eq. 0) then
      write(unit=7,fmt="(3e15.7)")  variable1, v2, v3
   end if

at the end of the DO loop, where 7 is an output file.

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