<beginfold id='1'><%!--</beginfold id='1'> Elixir expression: executes code and prints result <endfold id='1'>--%></endfold id='1'>
<% x = 1 %>
<%= foo<beginfold id='2'>(</beginfold id='2'><endfold id='2'>)</endfold id='2'> + bar<beginfold id='2'>(</beginfold id='2'><endfold id='2'>)</endfold id='2'> %>
<%% EEx quotation: returns the contents inside the tag as is %>
<beginfold id='1'><%!--</beginfold id='1'> Comments: they are discarded from source <endfold id='1'>--%></endfold id='1'>
<%| nil %>
<%/ nil %>
