title: Lua add two tables
body: <pre><code>x = {1, 2, 3}
  y = {4, 5, 6}
  z = x + y
  </code></pre>
  
  <p>I have two tables <code>x</code> and <code>y</code> and just want to create a third one which is just the elements of them two (not sorted). I use the above code in an effort but this gives error <code>input:3: attempt to perform arithmetic on a table value (global 'x')</code>...</p>