> For the complete documentation index, see [llms.txt](https://www.csvpath.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://www.csvpath.org/getting-started/the-flightpath-data-examples/headers/insert-and-append.md).

# Insert and append

{% hint style="success" %}
Run this example using its test data from within [FlightPath Data](https://www.flightpathdata.com/).
{% endhint %}

```
~
   This csvpath updates the test file data to have a processing date at the 0th header
   and a "modified by" header at the end of the line.

   id: insert and append

   test-data:examples/headers/projects.csv
~
$[*][

	insert( 0, "processing date", now() )
         append( "modified by", "CsvPath", yes() )

	last.nocontrib() -> print("See the Matches tab for the new column at the end of every line")
]
```