The electric potential, or potential difference, between two points is defined in words as the work to move a unit positive charge between the two points.
Electric potential is a scalar.
For convenience in calculating electric potential, one point is taken at infinity and has arbitrary potential of zero at that point. The unit of electric potential is the Volt, equal to a Joule per Coulomb. V near a positive charge is positive. It takes positive work to move a unit positive charge from infinity to the vicinity of a positive charge. In the vicinity of a charge the electric potential is given by For a large number of charges the voltages add as scalars.