@Ifnb - If Not Blank Directive

Syntax

@IFNB (arg) {block}

arg - An actual argument, or dummy arguments preceded by "?"

block - A valid block of text

Use

@IFNB includes the text contained within the block if the argument is not blank, meaning that it has more than 0 characters.

Examples

@IFNB ()
{ ABEL source here will not be included with the rest of the source file. }

@IFNB ( hello )
{ this text will be included }

@IFNB (?A)
{ this text will be included if a value is substituted for A}