User Guide

The context of a unit is displayed only if it is not the default context.
Important: In 1-D Math input, the quantity and unit (entered using the top-
level Unit command) are a product, not a single entity. The following calling
sequences define different expressions.
> 1*Unit(m)/2*Unit(s);> 1*Unit(m)/(2*Unit(s));
Some units support prefixes. For example, SI units support prefixes to names
and symbols. You can specify 1000 meters using kilometer or km. For more
information, refer to the ?Units/prefixes help page.
>
Performing Computations with Units
In the default Maple environment, you cannot perform computations with
quantities that have units. You can perform only unit conversions. For more
information about the default environment, refer to the ?Units/default help
page.
To compute with expressions that have units, you must load a Units envir-
onment, Natural or Standard. It is recommended that you use the Standard
environment.
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In the Standard Units environment, commands that support expressions
with units return results with the correct units.
102 • 3 Performing Computations