Actian X 12.0 | undef Statement--Undefine a Substitution Variable

Forms-Based Application Development Tools User Guide > Part 2: Vision > C. Template Files Reference > undef Statement--Undefine a Substitution Variable

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undef Statement--Undefine a Substitution Variable

Use the ##undef statement to undefine a substitution variable defined with the ##define statement. You can only undefine a user-defined substitution variable.

This statement has the following syntax:

##undef $variable

Example—undef statement:

The following statements indicate the value of the variable $status, and undefine it, if necessary.

##ifdef $status
/* '$status' is defined as $status */
##undef $status
/* '$status' is now undefined */
##else
/* '$status' is undefined */
##endif

Last modified date: 08/14/2024