o represent the various kinds of data (constants, variables, random numbers, sensor values, etc). The specific sources depend to a certain extent on which device you are using and are described in the SDK documentation available from LEGO.</P>

<P>NQC provides a special operator to represent a data source:</P>

<PRE><CODE>@ <I>constant</I></CODE></PRE>

<P>The value of this expression is the data source described by the constant. The lower 16 bits of the constant represent the data value, and the next