Units of measurement in programming languages (was Re: Complexity Shock Horror II: the Sequel)

[Marc Ernst Eddy van Woerkom]

>   However, aside from e and phi, I can't think of any popular constants
>   that are purely scalar in nature.  Many scalar constants are more like
>   pi, that is, a ratio between two measurements with the same unit
>   (circumference (distance) / diameter (distance).)

In particle physics you set c = hbar = 1 to have simpler formulas
(e.g. p^mu p_mu = E^2 - p^2 = m^2)

Regards,
Marc