The DO statement supports clauses that iterate over compound statements. With an iterative DO statement, you can repeatedly execute a set of statements until some condition stops the execution. The following table lists the different kinds of iteration statements in the SAS/IML language:
|
Clause |
DO Statement |
|
|---|---|---|
|
DATA |
DO DATA statement |
|
|
variable = start TO stop < BY increment > |
Iterative DO statement |
|
|
WHILE(expression) |
DO WHILE statement |
|
|
UNTIL(expression) |
DO UNTIL statement |
A DO statement can have any combination of these four iteration clauses, but the clauses must be specified in the order listed in the preceding table.