> For the complete documentation index, see [llms.txt](https://osl.mistium.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://osl.mistium.com/custom-syntax/commands.md).

# Commands

In osl you can define a custom command using the `def` command, as with all other custom syntax. A custom command will not return a value, and will simply allow for a script to reuse commands.

## Syntax

```javascript
def "my_command" "input1" (
  // run command stuff
)
```

## Example

```javascript
def "logtimes" "times, string" (
  loop times (
    log string
    // log the input string
  )
)

logtimes 5 "hello world"
// logs hello world 5 times
```


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