How to get download link for a Google Drive Docs & Slides File.

1. For Google Docs File. (Use the Sample URL below to download the file, Replace {{documentid}} with the id of the original document. You document should be publicly accessible.
> Sample:
https://docs.google.com/feeds/download/documents/export/Export?id={{documentid}}&exportFormat=pdf
> Actual: All Other Downloadable File Formats:
PDF Format RTF Format ODT Format HTML Format EPUB Format ZIP Format DOCX Format TXT Format

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2. For Google Slide File. (Use the sample URL below, Replace {{documentid}} with the id of the original document. You document should be publicly accessible.
> Sample:
https://docs.google.com/feeds/download/presentations/Export?id={{documentid}}&exportFormat=pdf
> Actual: All the following formats are available for download for Google Slides. You will find all the formats when you use the Share a file with anyone option. All Other Downloadable File Formats:
ODP Format PDF Format PPTX Format TXT Format