Fortran do...while迴圈結構


它重複語句或一組語句,當給定的條件為真。它測試的條件執行在迴圈體之前。

語法

do while (logical expr) 
   statements
end do

流程圖

do while

範例

program factorial  
implicit none  

   ! define variables
   integer :: nfact = 1   
   integer :: n = 1 
   
   ! compute factorials   
   do while (n <= 10)       
      nfact = nfact * n 
      n = n + 1
      print*,  n, " ", nfact   
   end do 
end program factorial  

當上述程式碼被編譯和執行時,它產生了以下結果:

1         1
2         2
3         6
4        24
5       120
6       720
7      5040
8     40320
9    362880
10  3628800