Examples of vectors are force, velocity, and displacement. A direction as well as size is associate with each of these quantities.
Scalars are quantities having size only.
Temperature, pressure, and currency are examples of scalars. Obviously, no direction is associated with these quantities. For example, three plus four dollars always equals seven dollars because currency does not have direction. However, the sum of two forces depends on the direction of the forces. Figure 1 illustrates the addition of perpendicular vectors.