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terraform/website/docs/configuration/functions/coalesce.html.md

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functions coalesce function docs-funcs-collection-coalesce-x The coalesce function takes any number of string arguments and returns the first one that isn't empty.

coalesce Function

coalesce takes any number of string arguments and returns the first one that isn't empty.

Examples

> coalesce("a", "b")
a
> coalesce("", "b")
b

To perform the coalesce operation with a list of strings, use the ... symbol to expand the list as arguments:

> coalesce(["", "b"]...)
b

Related Functions

  • coalescelist performs a similar operation with list arguments rather than string arguments.