Edits per Code Review

quickstart/101-dns_zone/variables.tf

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+variable "resource_group_location" {
+  type        = string
+  default     = "eastus"
+  description = "Location for all resources."
+}
+
+variable "resource_group_name_prefix" {
+  type        = string
+  default     = "rg"
+  description = "Prefix of the resource group name that's combined with a random value so name is unique in your Azure subscription."
+}
+
+variable "dns_zone_name" {
+  type        = string
+  default     = null
+  description = "Name of the DNS zone."
+}
+
+variable "dns_ttl" {
+  type        = number
+  default     = 3600
+  description = "Time To Live (TTL) of the DNS record (in seconds)."
+}
+
+variable "dns_records" {
+  type        = list(string)
+  default     = ["1.2.3.4", "1.2.3.5"]
+  description = "List of IPv4 addresses."
+}