The HasDimension(dim) function returns true if there is a dimension with the name dim. Otherwise, false is returned.

$\mathrm{with}\left(\mathrm{Units}\right)\:$

Automatically loading the Units[Simple] subpackage

$\mathrm{HasDimension}\left(\'\mathrm{length}\'\right)$

$\mathrm{true}$

$\mathrm{HasDimension}\left(\'\mathrm{speed}\'\right)$

$\mathrm{true}$

$\mathrm{HasDimension}\left(\'\mathrm{acceleration}\'\right)$

$\mathrm{true}$

$\mathrm{HasDimension}\left(\'\mathrm{surge}\'\right)$

$\mathrm{false}$

$\mathrm{AddDimension}\left(\'\mathrm{surge}\'\=\frac{\'\mathrm{length}\'}{{\'\mathrm{time}\'}^3}\right)$

$\mathrm{HasDimension}\left(\'\mathrm{surge}\'\right)$

$\mathrm{true}$