ruby - Strings passed from controller to view in Rails arrive empty -


i trying pass string view controller this:

controller:

def index     @str = 'foo' end

view:

string: <% @str %>

the variable seems arrive because no error. however, arrives empty (only "string" in html, nothing else). , seems work great other built-in types, e.g. time. missing here? use ruby 2.2.1 , rails 4.

as others have said, need use

<%= @str %>

i'll give explanation - use <% %> when need run ruby code don't want displayed screen. example, might have conditional logic 

<% if user_signed_in? %>     <%= @welcome_string %> <% end %>

use <%= %> when want output, drop '=' conditional logic or doesn't need display.


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