Types
1.String
A sequence of Unicode characters representing some text
Example : “hello”
Strings are usually represented by a double-quoted sequence of Unicode characters, "like this".
2.Number
A numeric value .
Numbers are represented by unquoted sequences of digits with or without a decimal point, like 15 or 6.283185
3.Bools
Bools are represented by the unquoted symbols true and false.
Bool values can be used in conditional logic.
4.List (or Tuple)
Lists/tuples are represented by a pair of square brackets containing a comma-separated sequence of values, like ["a", 15, true].
List literals can be split into multiple lines for readability, but always require a comma between values.
5.Map or Object
A group of values identified by named labels, like
{"Key" = "value"}
{name = "Martin", age = 22}.
6.Null
The null value is represented by the unquoted symbol null
A value that represents absence or omission. If you set an argument of a resource or module to null, Terraform behaves as though you had completely omitted it .