title: how can i solve this "Cannot subscript a value of type `[[String]]` with an index of type `UInt32`"
body: <p>i'm having a problem about this <code>UInt32</code> thing,
  the "answer" in my button is having an error about this "Cannot subscript a value of type <code>[[String]]</code> with an index of type <code>UInt32</code>"</p>
  
  <pre><code>let answers = [["1. After the exam, I felt too exhausted and famished to eat my foods.","2. I could eat a horse, I am a famish now.","3. I famished my stomach next time you treat me to a meal out.","4. I will bring lots of pizza, that's famish."],["Would","Has to","Must","Could"]]  
  
  var rightanswerplacement:UInt32 = 0
  
  
   rightanswerplacement = arc4random_uniform(2)+1
          var button:UIButton = UIButton()
  
          var x = 1
  
          for i in 1...3{
  
                  button = view.viewWithTag(i) as! UIButton
  
              if (i == Int(rightanswerplacement)){
                  button.setTitle(answers[rightanswerplacement][0], for: UIControlState.normal)
  
              }
              else{
                  button.setTitle(answers[rightanswerplacement][x], for: UIControlState.normal)
                  x = 2
              }
  
              currentquestions += 1
  
          }
  </code></pre>