# watch command

The watch command executes and re-executes
a TCL command continuously until the user cancels the execution by
pressing a key. The output of the first page of the specified TCL
command is displayed on the screen continuously.

## Syntax

```
watch {n} tcl.command (options
```

## Parameter(s)

| n | The number of seconds to sleep between command execution iterations. |
| --- | --- |
| tcl,command | The TCL command to execute. |
| options | The following options are supported: |
| r | Resume watch history from last session. |
When running the watch command a data
level is created to the WATCHLOG file in the
DM account (where the PIB number running the command is the data level
name). The results of the watch iterations (up
to a maximum of 100) are logged to this data level.

---
Source: https://d3codex.com/tcl/watch-command/ - part of the D3Codex reference.