Step-by-Step Programming with Base SAS 9.4

Summary

Statements

IF condition;

tests whether the condition is true. If it is true, then SAS continues processing the current observation. If it is false, then SAS stops processing the observation and returns to the beginning of the DATA step. This type of IF statement is called a subsetting IF statement because it produces a subset of the original observations.

IF condition THEN action;

<ELSE action;>

tests whether condition is true. If it is true, then the action in the THEN clause is executed. If the condition is false and an ELSE statement is present, the ELSE action is executed. If the condition is false and no ELSE statement is present, then execution proceeds to the next statement in the DATA step.

SET SAS-data-set (IN=