treatment of foreign exchange difference

since section 43A of Incometax Act shall not apply where an asset is purchased in India through a foreign currency loan, then what will be the consequence or treatment as per Incometax  Act in respect of change in rate of exchange of currency

In case of exchange loss, weather such loss should be debited to P&L a/c or

                                                                                                         it is Capital loss or

                                                                                 any other treatment of such loss