인덱스를 추가

cat <<EOT > main.tf
variable "names" {
  description = "Names to render"
  type        = list(string)
  default     = ["gasida", "akbun", "fullmoon"]
}
output "for_directive" {
  value = "%{ for name in var.names }\${name}, %{ endfor }"
}
output "for_directive_index" {
  value = "%{ for i, name in var.names }(\${i}) \${name}, %{ endfor }"
}
EOT


terraform apply -auto-approve