Please note that the volt and voltage are two different things. The volt is a unit by which we measure something. Both electric potential and voltage are things we measure and the volt is the unit of measure for both. The symbol for the unit volt is written with a V (9 volts or 9 V). When voltage is used in a formula, it can be typeset in italics, e.g., formula_1, or written in cursive. If there is only a single letter symbol to go by, a lowercase v may be used, e.g., formula_2 or formula_3. Electrical engineers use the symbol formula_4 for voltage, e.g., formula_5, to make the difference between voltage and volts very clear.