To get information about a customizable variable, you can use the following functions.
| variable-customized-p symbol | Function |
| Returns true if symbol has been customized by the user, false otherwise. |
| variable-declared-p symbol | Function |
| variable-default-value symbol | Function |
The variable-declared-p function returns true if the variable
named symbol has a default value declared for it, false
otherwise. The variable-default-value function returns the
default value of that variable, or nil if no such default value
exists.
|
| variable-type symbol | Function |
| Returns the customizable type of the variable named symbol. |