for and foreach demo

foreach-demo-2/securitygroup.tf

@@ -0,0 +1,13 @@
+resource "aws_security_group" "example" {
+  name = "example" # can use expressions here
+
+  dynamic "ingress" {
+    for_each = var.ports
+    content {
+      from_port   = ingress.key
+      to_port     = ingress.key
+      cidr_blocks = ingress.value
+      protocol    = "tcp"
+    }
+  }
+}