Use the IF-THEN-ELSE sequence to define a condition, test the truth of that condition, and initiate an action based on the test results. Do not code THEN and ELSE on the same logical line.

>>-+--------+--IF--logical_expression--THEN--+--------+--------->
   '-label:-'                                '-action-'   

>--+-----------------+-----------------------------------------><
   '-ELSE-+--------+-'   
          '-action-'     

label

A name the CLIST can reference in a GOTO statement to branch to this IF-THEN-ELSE sequence. label is one-to-31 alphanumeric characters, beginning with an alphabetic character.

logical_expression

A comparative expression or a sequence of comparative expressions sequenced by logical operators. The expression or expressions can include character data, including characters of the double-byte character set.

action

An executable command, subcommand, or CLIST statements. (Enclose an action consisting of more than one statement in a DO-sequence.) The THEN action is invoked if the logical expression is true. The ELSE action is invoked if the logical expression is false. If a null THEN or null ELSE statement is executed, control passes to the next sequential statement after the IF-THEN-ELSE sequence.

The action must be on the same line as a THEN or ELSE clause, or be joined to the line by a continuation character. For example, the following are correct:

IF &FOOTPRINT = 0 THEN SET ECODE = 4

IF &FOOTPRINT = 0 THEN + 
  SET ECODE = 4

IF &FOOTPRINT = 0 THEN + 
  DO
    SET ECODE = 4
⋮
  END