program exf5 ! exf5.f90   if, then, else  conditional statements

  double precision :: x = 2.0
  integer :: i = 3
  
  print *, "exf5.f90  if, then, else"
  if( x < 3.0 ) then  ! <  >  <=  >=  ==  !=  compare operations
    print *, "compare < > <= >= == != x=", x
  end if

  if( x > 3.0 .or. i == 3 .and. i > 2 ) then 
    print *, "logic  .or. , .and. , .not. i=", i
  end if

  if( x > 3.0 ) then
    print *, "x > 3.0"
  else if( x > 2.5 ) then
    print *, "x > 2.5"
  else
    print *, "x <= 3.0" 
  end if

end program exf5