For Each

You can provision a resource based on a list of variables by using the for_each block with the toset function applied to the list. The value of each element in the list is that accessible using the each object. Using toset the value and key properties of each will be the same.

resource "some_resource" "my_resource_group" {
    for_each = toset(["a", "b", "c"])
    name = each.value
}