If else in view

I have added a new field in my controller

$output['ticket:types'][$key]['plus'] = "Yes"

or

$output['ticket:types'][$key]['plus'] = "No"


there is also an existing $output['ticket:types'][$key]['download


In the view there is


{if ticket:types}

                    {ticket:types}']

                   {dropdown}

                    {/ticket:types}
                  {else}
                        
                        <label>No ticket types available.</label><br />
                {/if}        
  {/if}




How do I test the value of $output['ticket:types'][$key]['plus']  in the view? I doesn't recognise {if plus == "Yes}


Thanks