is current is scalar or vector quantity?

scalar

 Electric current is neither a scalar nor a vector quantity. Electric current in a wire has both magnitude and direction but there is no meaning of triangle rule there. Also since it is gives the magnitude of charge flowing per unit time it has nothing to do with the direction. If you still have any doubts you can check it from H.C. Verma's Concepts of Physics for +1.

The direction of flow of the Conventional current is opposite to the direction of flow of electrons. 

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Electric current is neither a scalar nor a vector quantity.

neither a scalar nor a vector quantity. its a tensor quantity which has 

 and 

neither a scalar nor a vector quantity. its a tensor quantity

 Its a tensor. It has direction as well as magnitude but it doesn't follow the triangle law of vector addition nor does it follow the paralellogram law

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tensor