Add explicit clarification that values like 0 and "" are truthy in Elixir (#13300)

Author: stevejay

lib/elixir/pages/getting-started/basic-types.md

@@ -167,6 +167,8 @@ iex> !nil
 true
 ```
 
+Similarly, values like `0` and `""`, which some other programming languages consider to be "falsy", are also "truthy" in Elixir.
+
 ## Atoms
 
 An atom is a constant whose value is its own name. Some other languages call these symbols. They are often useful to enumerate over distinct values, such as: