title: Elixir allow assign to variable two times
body: <p>Elixir values are immutable but i can assign two values to same variable. How immutable variable works in Elixir? if x is 5 and it is immutable how can i assign again 7 value? Shouldn't it throw an error?
  <a href="https://i.stack.imgur.com/1NDuu.png" rel="nofollow noreferrer">Iex example</a></p>