> ## Documentation Index
> Fetch the complete documentation index at: https://help.dingtalk.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Using functions

> Function-by-function guides — TEXTJOIN, DATEDIF, FIND, IF / IFS, ISBLANK, IFERROR, TEXT.

[Using TEXTJOIN](/aitable/formulas/using-functions/textjoin)

[Using DATEDIF](/aitable/formulas/using-functions/datedif)

[Using FIND](/aitable/formulas/using-functions/find)

[Using IF and IFS](/aitable/formulas/using-functions/if-and-ifs)

[Using ISBLANK](/aitable/formulas/using-functions/isblank)

[Using IFERROR](/aitable/formulas/using-functions/iferror)

[Using TEXT](/aitable/formulas/using-functions/text-function)