How do I export the results of a form in a csv format

You have to create a report or go to the submissions page and choose CSV download.

To create a CSV report: https://www.jotform.com/help/103-How-to-create-a-CSV-Report

To download in the submissions page: https://www.jotform.com/help/73-How-to-Download-Form-Submissions-as-Excel-CSV-PDF