# process.pid

## Function

Read the PID of the started child process.

## Syntax

```bt
process(program).child().pid()
```

## Parameters

No parameters.

## Return value

| Type | Description |
| ------ | ------ |
| Int/Empty | Returns PID if a child process has been started; returns Empty if there is no child process handle. |

## Example

```bt
cmd = process('cmd')
result = cmd.pid()

// Output:
print result
```

## Notes

- pid will not start the process, only read the existing child handle.