if (if/then) processing code

The if processing code is used in dictionary attributes 7 and 8 (conversion and correlative) to generate values based on results of evaluation of expression according to the rules of a-correlative construction.

The if processing code is a stand-alone version of the if conditional allowable within an a-correlative. If the condition evaluates to true (nonzero) the a-correlative following then is executed. If there is no then clause a null value is returned on true.

If the condition evaluates to 0 (false), the else clause is taken. Multiple complex conditionals can be constructed by using end to close the current if clause and associate else with the prior if clause.

System Processors Select, Update, List
Code Type Attribute Defining
Dictionary Attributes Input Conversion, Output Conversion, Correlative

Syntax

if condition{then a-correlative} {else a-correlative} {end}

Example(s)

if 2#4 then 4:’**’:2

if 14["1","3"]=’sco’ then 17