Rails 4/ERB if/else loop gives unexpected ;, expected : error, if I add html or text -


I am trying to create a mobile app in Rail 4 / ERB where people can post and comment on others' posts Are there. I want to be able to toggle the visibility of comments using jQuery, but whenever I try to wrap each loop in a div tag or add the number of comments, I get an error ('comment / The comment is partial with a template for the original comment)

This works, but shows all the comments (not what I want): 

   0? & Gt%; & Lt;% post.comments.order (: created_at) .reverse.each | Comment | & Gt%; & Lt;% = Render 'Comment / Comment', Comment: Comment% & gt; & Lt;% end% & gt; & Lt;%:% & gt; No comments yet. & Lt;% end% & gt;   
 This gives me an unexpected semicolon error:  
  & lt;% if post.comments.count> 0? & Gt%; & Lt;% = post.comments.count% & gt; notes. & Lt;% post.comments.order (: created_at) .reverse.each | Comment | & Gt%; & Lt;% = Render 'Comment / Comment', Comment: Comment% & gt; & Lt;% end% & gt; & Lt;%:% & gt; No comments yet. & Lt;% end% & gt;   
 does this:  
  <% if post.comments.count> 0? & Gt%; & Lt; Div & gt; & Lt;% post.comments.order (: created_at) .reverse.each | Comment | & Gt%; & Lt;% = Render 'Comment / Comment', Comment: Comment% & gt; & Lt;% end% & gt; & Lt; / Div & gt; & Lt;%:% & gt; No comments yet. & Lt;% end% & gt;   
 The exact words of the error are  syntax error, unexpected ;; Expected:   
 What I am doing is wrong, and how can I use HTML without any errors in this block? Any help will be very much appreciated. Appendix: Oddly, if I stick the comment code inside each loop, it works (but, because it is each loop, it displays multiple times)  
 Appendix 2: It also returns an error:  
  & lt;% = render 'comments / form', post: post% & gt; & Lt; / P & gt; & Lt;% if post.comments.count> 0? & Gt%; & Lt ;! - & lt;% = post.comments.count% & gt; notes. - & gt; & Lt;% post.comments.order (: created_at) .reverse.each | Comment | & Gt%; & Lt;% = Render 'Comment / Comment', Comment: Comment% & gt; & Lt;% end% & gt; & Lt;%:% & gt; No comments yet. & Lt;% end% & gt;    
 
 
 Try this type  
  & lt ;% = Render 'Comment / Form', Post: Post% & gt; & Lt; / P & gt; & Lt;% if post.comments.count> 0% & gt; & Lt ;! - & lt;% = post.comments.count% & gt; notes. - & gt; & Lt;% post.comments.order (: created_at) .reverse.each | Comment | & Gt%; & Lt;% = Render 'Comment / Comment', Comment: Comment% & gt; & Lt;% end% & gt; & Lt;% Someone else & gt; & Lt ;! - No comments yet --- & gt; & Lt;% end% & gt;   
  in line 2? Remove  because  post.comments.count> 0  will return  true  or  false , so you have to check again.  
 Therefore, you can now  else  condition.

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