Scalar and vector are two types of physical quantities in physics.
Scalar quantity refers to a physical quantity that has only a magnitude or size, but no direction. Examples of scalars are mass, temperature, time, distance, and speed. Scalar quantities are typically represented by a single number without any specific direction or orientation.
Vector quantity refers to a physical quantity that has both magnitude and direction. Examples of vectors are displacement, velocity, acceleration, and force. Vector quantities are typically represented by an arrow with the length representing the magnitude and the direction of the arrow representing the direction of the vector.
In summary, scalar quantities have only a magnitude, while vector quantities have both a magnitude and a direction.