A measurement without direction, meaning that it is only a magnitude (as opposed to vector which has magnitude and direction). E.g, a speed of 5km/h is a scalar while a velocity of 19m/s west is a vector.
Scalars are a type of number that have size (but not direction like vectors).
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What are difference between scalars and vectors
Vectors have a direction associated with them, scalars do not.
They both have a magnitude (size).
Because scalars do not take in the direction but just the magnitude while vectors can. You can add vectors ONLY if they are in the same direction.
The question is meaningless. Scalars have only magnitude.