Checks whether an option has been explicitly set by a script or from the command line or whether the option has a default value or computed value (return value of a func).

Parameters

Parameter Description
option_name String value of the built-in or custom option.

Returns

Boolean. Returns 1 (true) if the option value has been explicitly set. Returns 0 (false) if the option value is a default value, is null, or has not been explicitly set. For a discussion of Boolean, see vSphere SDK for Perl Programming Conventions.