Synonym for real number.

### Examples

- In an expression like
*A*= 12*x*\(^{2}\), the number 12 is a scalar. - It is important to distinguish scalar quantities from vector quantities: temperature and mass are scalar quantities while speed and force are vector quantities, because speed and force are not only characterized by their
**measure**,but also by their**direction**.

### ETYMOLOGICAL NOTE

The word *scalar* comes from the Latin *scala* which means “ladder” (to climb) or “graduation” (the bars of the ladder).

Later, in math, this term was used to refer to the idea of graduation on a board or a ruler.

It is a term that expresses the concept of standard size for measurement.