title: What is the difference between 'url' and 'path' in symfony2.3
body: <p>The document said </p>
  
  <pre><code>{# src/Acme/ArticleBundle/Resources/views/Article/recentList.html.twig #}
  {% for article in articles %}
      &lt;a href="{{ path('article_show', {'slug': article.slug}) }}"&gt;
          {{ article.title }}
      &lt;/a&gt;
  {% endfor %}
  </code></pre>
  
  <p>also, can use 'url' like this:</p>
  
  <pre><code>&lt;a href="{{ url('_welcome') }}"&gt;Home&lt;/a&gt;
  </code></pre>
  
  <p>it confused me what is the difference between using 'url' and 'path'?</p>