Added an example for "and" on if statment

doc/tags/if.rst

@@ -37,6 +37,14 @@ You can also use ``not`` to check for values that evaluate to ``false``:
         <p>You are not subscribed to our mailing list.</p>
     {% endif %}
 
+For multiple conditions ``and`` and ``or`` can be used:
+
+.. code-block:: jinja
+
+    {% if temperature > 18 and temperature < 27 %}
+        <p>It's a nice day for a walk in the park.</p>
+    {% endif %}
+
 For multiple branches ``elseif`` and ``else`` can be used like in PHP. You can use
 more complex ``expressions`` there too: