In Terraform, you will often need to convert a list to a string when passing values to configurations that require a string format, such as resource names, cloud instance metadata, or labels. Terraform uses HCL (HashiCorp Configuration Language), so handling lists requires functions like join() or format(), depending on the context.

How to Convert a List to a String in Terraform

The join() function is the most effective way to convert a list into a string in Terraform. This concatenates list elements using a specified delimiter, making it especially useful when formatting data for use in resource names, cloud tags, or dynamically generated scripts.