# ckey var (mob)

Source: https://ref.dm-lang.org/mob/var/ckey

### Default value
> null

This is the value of mob.key converted to canonical form (ie the form returned by the ckey() proc). Among other things, this could be used as a unique directory name in a server-side save file for storing player information. See the ckey() proc for an example.

### See also
- [ckey proc](https://ref.dm-lang.org/proc/ckey.md)
- [key var (mob)](https://ref.dm-lang.org/mob/var/key.md)