anchor.diff:      end
      return res
     end
  -  n=5
  +  n=10
     k=0
     for i in 0..n
         m=n-i-2
  
positive.code: <%= "<br>".to_s %>
  <% end %>
  
  </td></tr>
  </table>
  </form>
  
negative.code: <table border=1 bgcolor=#FAF0E6 width=500>
  <tr align=center><th><b>Pascals Triangle</b><br><br></th></tr>
  <tr align=center><td>
  
  <% 
    def factorial(n1)
     res=1
  