Statements execute in the order they are written.
RUN-group processing enables you to submit RUN groups without ending the procedure. Each RUN group is defined by the statements that compose it and by what causes it to execute. These RUN groups always execute immediately. If any of these statements appear in sequence in the PROC step, the sequence forms a RUN group. The SAS System reads the program statements that are associated with one task until it reaches a RUN statement or an implied RUN statement.