@cindex mode variable
Define a variable whose name ends in @samp{-mode}. We call this the
@dfn{mode variable}. The minor mode command should set this variable.
-The value will be @code{nil} is the mode is disabled, and non-@code{nil}
+The value will be @code{nil} if the mode is disabled, and non-@code{nil}
if the mode is enabled. The variable should be buffer-local if the
minor mode is buffer-local.