> 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_instance_methods/let.md).

# let | letBind

Returns an observable sequence that is the result of invoking the selector on the source sequence, without sharing subscriptions.

This operator allows for a fluent style of writing queries that use the same sequence multiple times. There is an alias of `letBind` for browsers older than IE 9.

## Arguments

1. `func` *(`Function`)*: Selector function which can use the source sequence as many times as needed, without sharing subscriptions to the source sequence.

## Returns

*(`Observable`)*: An observable sequence that contains the elements of a sequence produced by multicasting the source sequence within a selector function.

## Example