> For the complete documentation index, see [llms.txt](https://soufatn.gitbook.io/rxjs-book/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://soufatn.gitbook.io/rxjs-book/summary/observable/observable_methods/throw.md).

# throw

Returns an observable sequence that terminates with an exception, using the specified scheduler to send out the single onError message.

## Arguments

1. `dueTime` *(`Any`)*: Absolute (specified as a Date object) or relative time (specified as an integer denoting milliseconds) at which to produce the first value.
2. `[scheduler=Rx.Scheduler.immediate]` *(`Scheduler`)*: Scheduler to send the exceptional termination call on. If not specified, defaults to the immediate scheduler.

### Returns

*(`Observable`)*: The observable sequence that terminates exceptionally with the specified exception object.

### Example