# log var (world)

Source: https://ref.dm-lang.org/world/var/log

Sending output to world.log may be useful for debugging purposes. The output goes to the same place run-time proc errors are displayed.

```dm
if(1+1 != 2)
  world.log << "Uh oh."
```

You can assign world.log to a file name or file() object to redirect output to that file. (There is also a command-line option to Dream Daemon that does this.)

```dm
world.log = file("mylog.txt")
```

### See also
- [file proc](https://ref.dm-lang.org/proc/file.md)
- [startup proc](https://ref.dm-lang.org/proc/startup.md)