Scalar

In mathematics, scalars are components of Vector Space s (and Module s), usually Real Number s which can be multiplied into vectors by ''' Scalar Multiplication ''', or produced from vectors by ''' Scalar Product '''. The real component of a Quaternion is also called the '''scalar part'''. See ''' Scalar (mathematics) '''.

In physics, a scalar is a simple Physical Quantity that does not change under a change of Coordinate System ; for example, ''' Speed ''' (180 km/h) is a scalar, while ''' Velocity ''' (180 km/h '''north''') is a vector. See ''' Scalar (physics) '''.

In computing, a scalar is a Variable or Field that can hold only one value at a time; as opposed to composite variables like Array , List , Record , etc.. In some contexts, a scalar value may be understood to be numeric. A '''scalar data type''' is the type of a scalar variable. For example, char, int, float, and double are the most common scalar data types in the C Programming Language .

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