Will full evaluation, variables previously defined are evaluated before the definition is stored. Thus, definitions of expressions can depend on the order in which they are made. Use an equals sign preceded by a colon to make an assignment for full evaluation.
To assign the value 25 to z
Thereafter, until you exit the documentor undefine the variable,
if a has not been previously defined, the system recognizes z as 25a.
If a has previously been defined to be x + y, then the system recognizes z as
25x + y
. Try the following examples that
contrast the two types of assignments, and look at the list displayed under
Define + Show Definitions for each case.