> 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/merge.md).

# merge

Merges an observable sequence of observable sequences into an observable sequence, limiting the number of concurrent subscriptions to inner sequences. Or merges two observable sequences into a single observable sequence.

## Arguments

1. `maxConcurrent` *(`Function`)*: Maximum number of inner observable sequences being subscribed to concurrently.
2. `other` *(`Observable`)*:  The second observable sequence to merge into the first.

## Returns

*(`Observable`)*: The observable sequence that merges the elements of the inner sequences.

## Example

## Merge two sequences

## Use max concurrency