A scalar is a variable that only has magnitude, e.g. a speed of 40 km/h. Compare it with vector, a quantity comprising both magnitude and direction, e.g. a velocity of 40km/h north.
- A scalar (mathematics), a quantity which is independent of viewpoint, a non-tensor.
- A scalar (physics), the same as the notion of scalar in differential geometry.
- A scalar (computing), an atomic quantity that can hold only one value at a time.
See also
- Scalar field
- Scalar multiplication
- Inner product space
- Scalar product, also known as the dot product
- Pseudoscalar
- Scalar processor
- Pterophyllum scalare (Lichtenstein, 1823), a species of freshwater angelfish.
