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+module module1
+! Identity of a utility
+! ____________________________________________________________________
+ character (len=*), parameter :: xyz = &
+"I am just a more or less long string."
+ character (len=*), parameter :: zhlp = '( &
+&"This program is free software; you can redistribute it and/or modify"/&
+&"____________________________________________________________________")'
+integer:: n
+contains
+
+recursive subroutine sub1(x)
+integer,intent(inout):: x
+integer:: y
+y=0
+if (x<n) then
+ x= x + 1
+ y =x**2
+ print *, 'x = ', x,', y = ', y
+ call sub1(x)
+ print *, 'x = ', x,', y = ', y
+end if
+end subroutine sub1
+
+end module module1
+
+program main
+use module1
+integer:: x = 0
+print *, 'Enter number of repeats'
+read (*,*) n
+call sub1(x)
+end program main \ No newline at end of file