When writing Terraform code, HashiCorp recommends that you use how many spaces between each nesting level?

0 spaces would mean no indentation at all, making nested blocks visually indistinguishable from top-level blocks and violating HashiCorp style conventions.

1 space is not the recommended indentation level; HashiCorp specifies 2 spaces as the standard for readability and consistency.

The HashiCorp Terraform style conventions explicitly recommend 2 spaces for each level of nesting within blocks. This applies to resource, variable, output, and all other block types, and `terraform fmt` enforces this standard automatically when formatting code.

4 spaces is a common convention in other languages like Python, but Terraform's official style guide specifies 2 spaces, not 4.