Differences between scalar and vector quantity.

Scalar Quantity	Vector Quantity
It has only magnitude.	It has both magnitude and direction.
Problems of scalar quantities are solved by simple rules of algebra.	Problems of vector quantities are solved by rules of vector algebra.
Sum of scalar quantities is always positive.	Sum of vector quantities can be positive, zero or negative.
It is denoted by normal letters.	It is denoted by an arrow or bold letters.