| Discussion:
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The UNSET statement is a compiler directive. As such, it causes an action
to occur when the program is compiled, not when the program is executed.
The UNSET directive can appear anywhere in an Internet Basic source program.
To facilitate the manipulation of symbolic constants for
conditional compilation
purposes, the Internet Basic language includes the UNSET directive.
The UNSET directive clears the definition of the symbolic constant
(i.e., "un-defines" it). This directive is particularly useful when
working with the
.IFDEF and
.IFNDEF directives.
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