In the Simple Units environment, any verifications of valid dimensions ignore so-called Unit annotations.

In the Simple Units environment, the arguments for the exponential functions must be unit-free.  If you would like to apply the exponential function to an expression with the dimension of logarithmic gain, consider using the Standard Units environment.

Every command in the Simple Units environment that needs to determine whether an expression is valid or not, does so using the Units:-TestDimensions command.

Note that the first calling sequence must be entered in 2-D math notation by using either the palettes or command completion. The exponential $e^x$ will not be recognized if it is entered manually.

For other properties, see the global function exp.

To enter a unit in 2-D Math input, select the unit from the appropriate Units palette. If the unit you want is not there, select $\mathrm{unit}$ and then enter the unit.

When you edit a unit, double brackets appear around it.

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

$\exp \left(2.5\right)$

$12.18249396$

$\exp \left(2.5\mathrm{Unit}\left(m\right)\right)$

Error, (in Units:-Simple:-exp) the following expressions imply incompatible dimensions: {exp(2.5*Units:-Unit(m))}

$\exp \left(\frac{x}{\mathrm{Unit}\left(m\right)}\right)$

${\ⅇ}^{x⟦\frac{1}{m}⟧}$

$\mathrm{eval}\left(\,x=250.\mathrm{Unit}\left(\mathrm{cm}\right)\right)$

$12.18249396$