---
title: par-each
layout: command
version: 0.59.0
Run a block on each element of input in parallel
## Signature
```> par-each (block) --numbered```
## Parameters
- `block`: the block to run
- `--numbered`: iterate with an index
## Examples
Multiplies elements in list
```shell
> [1 2 3] | par-each { |it| 2 * $it }
```