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Alex Rivera
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Good practice dictates that subroutine arguments in Fortran should each have a specified intent (i.e. intent(in) , intent(out) or intent(inout) as described this question ): subroutine bar (a, b) real, intent(in) :: a real, intent(inout) :: b b = b + a ... However, not specifying an intent is valid Fortran: subroutine bar (a, b) real, intent(in) :: a real :: b b = b + a ... Are there any real differences beyond compile time checking for an argument specified as intent(inout) and an argument without a specified intent? Is there anything I should worry about if I'm retrofitting intents to older, intent free, code?
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