far in this chapter, you've read existing data. But sometimes
existing data doesn't provide the information you need. To modify
existing values or to create new variables, you can use an
assignment statement in any DATA step.
General form, assignment
variable names a new or existing
expression is any valid SAS
The assignment statement is one of
the few SAS statements that doesn't begin with a keyword.
example, here is an assignment statement that assigns the character
to the variable Name: