# os/pid
Return the current process id.
## Syntax
[os/pid]
## Examples
[os/pid] # → 147284 (current process; varies) [os/kill [os/pid] :sigusr1] # self-send, e.g. for signal testing
## Returns
A number — the process id from `getpid()`.
## See Also
`os/kill`, `os/on-signal`, `os/exit`