> For the complete documentation index, see [llms.txt](https://xlswriter-docs.viest.me/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://xlswriter-docs.viest.me/english/reader/data-type-const.md).

# Data type constants

```bash
Const TYPE_STRING = 0x01;    // string
Const TYPE_INT = 0x02;       // Integer
Const TYPE_DOUBLE = 0x04;    // floating point
Const TYPE_TIMESTAMP = 0x08; // timestamp to convert the formatted time character in the xlsx file to a timestamp
```